Popular
Developer Tools (200)
Popular
Description
The best tools for developers
[Update Sep 2025] 200 Links 
| Website | URL | Category | Pricing | Notes |
|---|---|---|---|---|
| GitHub Copilot | Visit | Coding Assistant | Paid | Code suggestions in IDE (VS Code/JetBrains/Neovim) |
| Codeium | Visit | Coding Assistant | Freemium | AI autocomplete and chat for many IDEs |
| Tabnine | Visit | Coding Assistant | Freemium | Local + cloud AI code completions |
| AWS CodeWhisperer | Visit | Coding Assistant | Freemium | AI code suggestions; deep AWS integration |
| Sourcegraph Cody | Visit | Coding Assistant | Freemium | Repo-aware chat + code intelligence |
| JetBrains AI Assistant | Visit | Coding Assistant | Paid | Inline AI, code chat, and docs for JetBrains IDEs |
| Replit Ghostwriter | Visit | Coding Assistant | Freemium | Code completion and explain in Replit |
| Cursor IDE | Visit | AI IDE | Freemium | AI-native code editor with chat and agents |
| Windsurf (Codeium IDE) | Visit | AI IDE | Freemium | Cursor-like AI IDE with 'agents' |
| Continue.dev | Visit | IDE Copilot | Free | Open-source autopilot for VS Code/JetBrains |
| Aider | Visit | CLI Copilot | Free | Chat with your repo from the terminal |
| OpenDevin | Visit | Agentic Dev | Free | Open-source autonomous software agent |
| AutoDev (Tencent) | Visit | Agentic Dev | Free | LLM-powered dev agent framework |
| OpenAI Assistants API | Visit | Agent API | Paid | Build tool-using AI agents with files + code interp |
| Vercel AI SDK | Visit | AI SDK | Free | Streaming chat, tools, RAG for JS/TS apps |
| Next.js AI SDK | Visit | AI SDK | Free | Edge-ready AI routes, tool calling, RAG |
| Supabase AI | Visit | Dev Platform | Freemium | SQL/Edge functions with AI helpers |
| Railway + AI | Visit | Dev Platform | Freemium | Deploy AI apps with templates and GPUs |
| Modal | Visit | Serverless GPU | Freemium | Python serverless for AI, schedules, GPUs |
| Replicate | Visit | Model Hosting | Freemium | Run OSS models via API; deploy custom |
| Baseten | Visit | Model Hosting | Freemium | Serve and scale ML models with GPUs |
| Banana.dev | Visit | Model Hosting | Paid | Serverless GPUs for PyTorch models |
| Anyscale Endpoints | Visit | Model Hosting | Freemium | Serve open models with Ray |
| Fireworks AI | Visit | Model API | Freemium | Hosted open models (Llama, Mixtral, etc.) |
| Together AI | Visit | Model API | Freemium | Inference + finetuning for open models |
| Groq API | Visit | Model API | Freemium | Fast LPU inference for Llama/Mixtral |
| OpenRouter | Visit | Model Router | Freemium | One API for many LLM providers/models |
| Mistral AI API | Visit | Model API | Freemium | Open-weight LLMs via API |
| xAI Grok API | Visit | Model API | Paid | Grok models for chat/coding via API |
| Cohere AI | Visit | Model API | Paid | Command/Embed models for enterprise |
| Anthropic Claude API | Visit | Model API | Paid | Claude 3.x models for chat/tools |
| Google Gemini API | Visit | Model API | Freemium | Gemini models + tools for devs |
| Azure OpenAI Service | Visit | Model API | Paid | OpenAI models on Azure with enterprise controls |
| NVIDIA NIM | Visit | Inference Microservices | Freemium | Prebuilt containers for popular models |
| Ollama | Visit | Local Models | Free | Run and manage LLMs locally via CLI |
| llama.cpp | Visit | Local Inference | Free | CPU/GPU inference of GGUF models |
| text-generation-webui | Visit | Local Inference | Free | Web UI to run many LLMs locally |
| vLLM | Visit | Inference Engine | Free | Fast LLM serving with PagedAttention |
| TensorRT-LLM | Visit | Inference Engine | Free | Optimized LLM inference on NVIDIA GPUs |
| OpenVINO | Visit | Inference Optim | Free | Optimize/serve models on Intel HW |
| ONNX Runtime | Visit | Inference Runtime | Free | Cross-platform inference for ONNX models |
| Core ML Tools | Visit | Model Conversion | Free | Convert models to Apple Core ML |
| TF Lite | Visit | Edge Inference | Free | TensorFlow for mobile/embedded |
| NCNN | Visit | Edge Inference | Free | High-performance inference on mobile |
| MLC LLM | Visit | Web/Edge Inference | Free | Run LLMs via WebGPU/TVM |
| PyTorch | Visit | DL Framework | Free | Popular deep learning framework |
| TensorFlow | Visit | DL Framework | Free | Google’s deep learning framework |
| JAX | Visit | DL Framework | Free | High-performance autodiff for ML |
| Hugging Face Transformers | Visit | NLP Library | Free | State‑of‑the‑art model library |
| HF Diffusers | Visit | GenAI Library | Free | Pipelines for diffusion models |
| LangChain | Visit | Agent/RAG Framework | Free | Build LLM apps with tools/memory |
| LlamaIndex | Visit | RAG Framework | Freemium | Connect data sources to LLMs |
| Haystack (deepset) | Visit | RAG Framework | Free | QA/RAG with pipelines and UI |
| DSPy | Visit | Program Synthesis | Free | Optimize LLM pipelines via declarative prompts |
| Guidance | Visit | Prompt DSL | Free | Program structured generation control |
| LMQL | Visit | Prompt Language | Free | Query language for LLMs with constraints |
| Instructor | Visit | Pydantic IO | Free | Structured outputs with Pydantic |
| Guardrails AI | Visit | Validation/Guardrails | Freemium | Schema + policy validation for LLMs |
| PydanticAI | Visit | Structured LLM | Free | Function/tool calling w/ type safety |
| OpenAI Evals | Visit | Eval Framework | Free | Evaluate LLMs and prompts |
| LangGraph | Visit | Agent Framework | Free | Stateful multi-agent graphs |
| AutoGen (Microsoft) | Visit | Agent Framework | Free | Multi-agent conversations and tools |
| CrewAI | Visit | Agent Framework | Freemium | Role-based autonomous agent framework |
| Swarm (OpenAI examples) | Visit | Agent Patterns | Free | Lightweight pattern for agents |
| ParlAI (Meta) | Visit | Research Framework | Free | Dialog research platform |
| OpenAI Function Calling | Visit | Tool Use | Paid | LLM tool calling schema/API |
| Pinecone | Visit | Vector DB | Paid | Managed vector search + filters |
| Weaviate | Visit | Vector DB | Freemium | Open-source + cloud vector DB |
| Milvus | Visit | Vector DB | Free | Open-source scalable vector DB |
| Qdrant | Visit | Vector DB | Freemium | Open-source vector DB + cloud |
| Chroma | Visit | Vector DB | Free | Lightweight local vector database |
| Redis (Vector) | Visit | Vector Store | Freemium | Redis Stack with vector search |
| Elasticsearch (ES|ER) | Visit | Vector Search | Freemium | Hybrid search with dense vectors |
| OpenSearch k-NN | Visit | Vector Search | Free | Approximate k-NN plugin for vectors |
| Vespa.ai | Visit | Vector/Hybrid Search | Free | Open-source engine for large-scale search |
| pgvector | Visit | Postgres Extension | Free | Embeddings in PostgreSQL |
| Neo4j Vector | Visit | Graph + Vector | Freemium | Graph-native vector & RAG patterns |
| OpenAI Embeddings | Visit | Embeddings API | Paid | Text-embedding models via API |
| Cohere Embed | Visit | Embeddings API | Paid | Multilingual embeddings |
| Voyage AI | Visit | Embeddings API | Paid | High-performance embeddings + rerank |
| Jina Embeddings | Visit | Embeddings API | Freemium | Context-lengthy, multilingual |
| Nomic Embed | Visit | Embeddings | Freemium | Open embeddings + visualization |
| Sentence-Transformers | Visit | Embeddings Library | Free | Python library for embeddings |
| bge (BAAI) Models | Visit | Embeddings | Free | Open bge embeddings collection |
| Cohere Rerank | Visit | Reranker API | Paid | Rerank search results with LLMs |
| Jina Reranker | Visit | Reranker API | Freemium | Cross-encoder rerank service |
| Voyage Rerank | Visit | Reranker API | Paid | Top-quality reranking models |
| Elasticsearch ELSER | Visit | Neural Search | Freemium | Sparse + dense retrieval |
| Label Studio | Visit | Data Labeling | Freemium | Open-source labeling for text/vision |
| Prodigy | Visit | Data Labeling | Paid | Scriptable annotation tool from Explosion |
| Labelbox | Visit | Data Labeling | Paid | Platform for annotation & QA |
| Scale Nucleus | Visit | Data Curation | Paid | Dataset management and curation |
| Encord | Visit | Data Labeling | Paid | Labeling + active learning |
| Snorkel AI | Visit | Programmatic Labeling | Paid | Weak supervision + labeling functions |
| Cleanlab | Visit | Data Quality | Freemium | Find label errors and improve datasets |
| MLflow | Visit | MLOps | Free | Track experiments, packages, deploy models |
| Weights & Biases | Visit | MLOps | Freemium | Experiment tracking, evals, reports |
| Comet ML | Visit | MLOps | Freemium | Experiment tracking and observability |
| Neptune.ai | Visit | MLOps | Freemium | Run metadata store & model registry |
| DVC | Visit | Data Versioning | Free | Data/model version control for ML |
| LakeFS | Visit | Data Versioning | Free | Git-like versioning for data lakes |
| Pachyderm | Visit | Data Pipelines | Freemium | Versioned data pipelines for ML |
| Ray | Visit | Distributed Compute | Free | Scale Python/ML workloads; Serve |
| Flyte | Visit | Workflow Orchestration | Free | K8s-native workflows for ML/data |
| Kubeflow | Visit | MLOps Platform | Free | Kubernetes ML toolkit |
| KServe | Visit | Model Serving | Free | Serverless inference on Kubernetes |
| Seldon Core | Visit | Model Serving | Free | Kubernetes model serving & explainers |
| BentoML | Visit | Model Serving | Freemium | Package models as APIs + deploy |
| TorchServe | Visit | Model Serving | Free | Serving framework for PyTorch models |
| Triton Inference Server | Visit | Model Serving | Free | High-performance universal inferencing |
| Fiddler AI | Visit | Model Monitoring | Paid | Explainability & monitoring for models |
| Arize AI | Visit | Model Observability | Paid | Monitor drift, evals, and RAG |
| WhyLabs | Visit | Data/Model Monitoring | Freemium | Data and LLM app monitoring |
| Evidently AI | Visit | Model Monitoring | Freemium | Open-source ML monitoring tools |
| TruLens | Visit | LLM Evaluation | Free | Feedback functions and eval dashboards |
| Ragas | Visit | RAG Evaluation | Free | Evaluate retrieval/answer quality |
| DeepEval | Visit | LLM Evaluation | Free | Test LLM outputs with metrics |
| Giskard AI | Visit | Model Testing | Freemium | Guardrails & tests for ML/LLM models |
| Langfuse | Visit | LLM Observability | Freemium | Traces, evals, prompt/versioning |
| PromptLayer | Visit | Prompt Ops | Freemium | Track and manage prompts/experiments |
| Promptfoo | Visit | Prompt Testing | Free | CLI to test prompts across models |
| Humanloop | Visit | Prompt Ops | Paid | Prompt management, evals, feedback |
| Promptable | Visit | Prompt Ops | Freemium | Version prompts and evaluate |
| OpenPipe | Visit | Fine-tune & Logs | Freemium | Collect logs; fine‑tune small LLMs |
| HoneyHive | Visit | LLMOps | Freemium | Eval, monitor, iterate LLM apps |
| Portkey | Visit | LLM Gateway | Freemium | Observability, routing, caching, guardrails |
| Helicone | Visit | LLM Observability | Freemium | Open-source proxy for LLM telemetry |
| ModelFusion | Visit | LLM SDK | Free | TypeScript SDK unified across providers |
| Airflow | Visit | Workflow | Free | Programmatic DAGs for data/ML |
| Prefect | Visit | Workflow | Freemium | Python orchestration for data/ML |
| Dagster | Visit | Data Orchestrator | Freemium | Assets/jobs for data/ML |
| dbt Core | Visit | Analytics Eng | Free | Transform data in SQL with lineage |
| Dataform (GCP) | Visit | Analytics Eng | Free | Warehouse-native data workflows |
| Unstructured.io | Visit | Doc Parsing | Freemium | Parse PDFs, slides, etc. for RAG |
| LLM University (txtai) | Visit | RAG Toolkit | Free | Embeddings DB, search, pipelines |
| LlamaParse | Visit | Doc Parsing | Paid | High-quality parsing for PDFs |
| LangChain Expression Language | Visit | Pipelining | Free | Composable chains for LLM apps |
| Haystack Components | Visit | RAG Components | Free | Nodes for pipelines and RAG |
| Zep Memory | Visit | Long-term Memory | Freemium | Vector memory store + API for LLMs |
| OpenAI Whisper API | Visit | Speech-to-Text | Paid | Robust STT from OpenAI |
| Whisper.cpp | Visit | Local STT | Free | Run Whisper locally (CPU/GPU) |
| AssemblyAI | Visit | Speech-to-Text | Freemium | STT with diarization, topics, PII redaction |
| Deepgram | Visit | Speech-to-Text | Freemium | Low-latency streaming speech API |
| Vosk | Visit | Offline STT | Free | On-device speech recognition toolkit |
| ElevenLabs API | Visit | Text-to-Speech | Freemium | Realistic TTS and voice cloning |
| Azure Cognitive Speech | Visit | Speech APIs | Paid | STT/TTS with custom voices |
| Google Cloud Speech | Visit | Speech APIs | Paid | Streaming and batch STT |
| Amazon Transcribe | Visit | Speech APIs | Paid | STT with custom vocabularies |
| OpenAI Vision | Visit | Vision API | Paid | Image understanding + OCR |
| Google Cloud Vision | Visit | Vision API | Paid | OCR, detection, labeling |
| AWS Rekognition | Visit | Vision API | Paid | Image/video analysis |
| Roboflow | Visit | CV Platform | Freemium | Data, training, deploy for CV models |
| Ultralytics YOLO | Visit | CV Models | Freemium | YOLOv5/v8/v9 training & deploy |
| OpenCV | Visit | CV Library | Free | Computer vision algorithms and I/O |
| Supervision (Roboflow) | Visit | CV Toolkit | Free | Pipelines for CV post-processing |
| Lakera Guard | Visit | Prompt Security | Freemium | Detect injection & toxicity |
| Rebuff | Visit | Prompt Injection Defense | Free | Open-source guard for LLM attacks |
| Protect AI | Visit | ML Security | Paid | Supply chain, scans, runtime security |
| NVIDIA Morpheus | Visit | Cybersecurity AI | Free | GPU-accelerated cyber pipelines |
| OpenAI Safety Spec | Visit | Safety Guide | Free | Best practices for safe LLM apps |
| Axolotl | Visit | Fine-tuning | Free | SFT/QLoRA training harness |
| LoRA (PEFT) | Visit | Parameter-Efficient FT | Free | PEFT library for LoRA/QLoRA |
| TRL (HF) | Visit | RLHF/FT | Free | SFT, PPO, DPO training recipes |
| Colossal-AI | Visit | Distributed Training | Free | Large-scale training toolkit |
| Deepspeed | Visit | Distributed Training | Free | Memory-efficient training/inference |
| BitsAndBytes | Visit | Quantization | Free | 8-bit/4-bit quantization for LLMs |
| NVIDIA NeMo | Visit | Model Toolkit | Freemium | Framework for ASR, NLP, TTS |
| Lightning AI (PyTorch Lightning) | Visit | Training Platform | Freemium | Train/serve models with Lightning |
| Weights & Biases Weave | Visit | LLM Dev | Freemium | Type-safe Python framework for LLM apps |
| SQLite VSS | Visit | Vector Extension | Free | SQLite extension for vector search |
| DuckDB + MotherDuck | Visit | OLAP/Embedded | Freemium | Fast local analytics for RAG pipelines |
| LangChain Cache (Redis/SQLite) | Visit | LLM Cache | Free | Caching responses for cost/latency |
| SWR/React Query (AI) | Visit | Client Cache | Free | Cache/call patterns for AI UIs |
| Gradio | Visit | UI Toolkit | Freemium | Build demo UIs for models quickly |
| Streamlit | Visit | App Framework | Freemium | Python web apps for data/AI |
| Shiny for Python | Visit | App Framework | Free | Reactive web apps in Python |
| Dash Plotly | Visit | App Framework | Freemium | Analytic web apps for ML outputs |
| Chainlit | Visit | LLM App UI | Freemium | Chat UIs for LangChain/LlamaIndex |
| OpenWebUI | Visit | LLM Chat UI | Free | Self-hosted UI for local models |
| LiteLLM | Visit | LLM Proxy | Freemium | One SDK for many LLMs + caching |
| LangSmith | Visit | LLM Observability | Paid | Tracing, datasets, evals for LangChain |
| Phoenix (Arize) | Visit | LLM Observability | Freemium | Trace, evaluate, and compare LLM apps |
| LlamaIndex Cloud | Visit | RAG Platform | Freemium | Hosted indices, pipelines, and evals |
| Snowflake Cortex | Visit | Data Cloud + AI | Paid | Built-in functions, apps, vector |
| Databricks DBRX/AI | Visit | Lakehouse + AI | Paid | Optimized serving, evals, vector |
| Postgres ML | Visit | Database ML | Free | Train/infer inside PostgreSQL |
| MongoDB Atlas Vector | Visit | Vector Store | Freemium | Vector search in MongoDB Atlas |
| PlanetScale + Vector | Visit | MySQL Serverless | Freemium | MySQL platform; vector via plugins |
| Neon + pgvector | Visit | Serverless Postgres | Freemium | Serverless Postgres with pgvector |
| Deepchecks LLM | Visit | LLM Testing | Free | Test quality, robustness, safety |
| Datasette | Visit | Data Browser | Free | Publish/query data for eval datasets |
| Great Expectations | Visit | Data Testing | Free | Validate data used by AI systems |
| Cerbos + AI | Visit | Authorization | Free | Policy engine; guard LLM tools/actions |
| OpenAI Tools/Functions | Visit | LLM Tools | Paid | Connect external APIs as tools |
| Microsoft Semantic Kernel | Visit | Orchestration SDK | Free | C#/.NET + TS orchestration |
| OpenAI Realtime API | Visit | Realtime API | Paid | Live multimodal streaming & tools |
| Suno API (audio) | Visit | Audio Gen API | Freemium | Music generation API (where available) |
| ElevenLabs Conversational | Visit | Voice API | Freemium | Streaming TTS + voice chat tools |
| Play.ht API | Visit | TTS API | Freemium | Neural voices and voice cloning |
| Tinygrad | Visit | DL Framework | Free | Educational ML framework |
