#documentation

Metapatterns

A human-curated compendium of software architectural patterns organized into a hierarchical pattern language. Hand-illustrated reference site showcasing hundreds of patterns grouped into ~20 metaclasses. Online version of author's book with clean, intuitive NoUML diagrams.

Diátaxis — Documentation Framework

A systematic, pragmatic approach to organizing and writing technical documentation. Proposes four documentation types (tutorials, how-to guides, reference, explanation) and their relationships. Reference site maintained by an enthusiast with substantive research and methodology.

Bitsavers

Legendary archive preserving computer manuals, documentation, and software from the early days of computing. An essential resource for computer history.

tldr pages

Simplified man pages. Community-maintained examples for command-line tools that actually help.

Keep a Changelog

How to write a good changelog. Don't let your friends dump git logs.

SQLite

The most deployed database in the world. Excellent documentation and fascinating technical articles about its design.

DevDocs

API documentation browser with offline support. Search across hundreds of frameworks in one place.