GuideTop pickBookmarks
Courses, tools and sites worth your time, plus the browser extensions I can’t live without.
Top pickFree course
Introduction to LangGraph
by LangChain Academy
The official free course on LangGraph: state, memory, human-in-the-loop and multi-agent systems, from the team that builds it.
Start the courseLearn
Courses and guides that are worth your evenings.
GuideTop pick
CourseAI Engineering from Scratch
Write backprop, a tokenizer, attention and an agent loop by hand before touching a framework.
aiengineeringfromscratch.com
CourseClaude Code in Action
Anthropic’s free course on working with Claude Code: context, tools, hooks and MCP. Comes with a certificate.
anthropic.skilljar.com
CourseIntroduction to MCP
Anthropic’s free course on building MCP servers and clients that give models tools and data.
anthropic.skilljar.com
CourseAI Agents in LangGraph
A short DeepLearning.AI course that builds an agent from scratch, then rebuilds it with LangGraph.
deeplearning.ai
CourseHugging Face Agents Course
Free, hands-on course on how agents work and how to build them with popular frameworks.
huggingface.co
CourseHugging Face MCP Course
Free course on the Model Context Protocol, from the concepts to working servers.
huggingface.co
GuidePrompt Engineering Guide
Techniques, papers and examples for prompting LLMs and building with them.
promptingguide.ai
Docs
Docs
CourseTotal TypeScript
Matt Pocock’s TypeScript tutorials, from the basics to advanced type patterns.
totaltypescript.com
CourseConfluent Developer
Free courses on Apache Kafka, event streaming and stream processing.
developer.confluent.io
GuideSystem Design Primer
How to design large-scale systems, with exercises, trade-offs and diagrams.
github.com/donnemartin/system-design-primer
AI tools
Gateways, observability and storage for LLM apps.
ToolOmniRoute
Free, open-source AI gateway: one OpenAI-compatible endpoint across hundreds of providers, with automatic fallback.
github.com/diegosouzapw/OmniRoute
ToolHeadroom
Compresses what an AI agent reads (tool output, logs, files, history) before it reaches the model. Runs locally as a library, proxy or MCP server.
github.com/headroomlabs-ai/headroom
Tool
Tool
Librarypgvector
Vector similarity search inside PostgreSQL, for RAG and embeddings.
github.com/pgvector/pgvector
Dev tools
Diagrams, API testing, deployment and everyday helpers.
UI components
Copy-paste components and effects for the web.
Design tools
Mockups, code images and CSS generators.
Free stuff
Free tiers, free APIs and tools that need no sign-up.
DirectoryTop pick
Directory
DirectoryPublic APIs
A collective list of free APIs for side projects and prototypes.
github.com/public-apis/public-apis
