Style Conventions for Writers and Editors
The Red Hat Technical Writing Style Guide and Word Usage Dictionary is a joint effort by various groups within Red Hat. It is intended as a supplement to the titles listed in
documentation
C4 model
The C4 model for visualising software architecture
The OpenSky Network API documentation
The OpenSky Network API 1.4.0 documentation
Protocol Buffers
Protocol Buffers are language-neutral, platform-neutral extensible mechanisms for serializing structured data.
DevDocs
Fast, offline, and free documentation browser for developers. Search 100+ docs in one web app including HTML, CSS, JavaScript, PHP, Ruby, Python, Go, C, C++, and many more.
Zeal - Offline Documentation Browser
Offline Documentation Browser
N0i.Net: The Perl Journal
The ultimate Romanian Linux techz lounge... filled up with great pieces of software, documentation and many more. N0i.Net is a project mastered and maintained by AltBlue.
NDR Doku
Dokumentationen und Reportagen des Norddeutschen Rundfunks (NDR).
Gentoo Forums :: View topic - Installation Guide for Paranoid Dummies
Installation Guide for Paranoid Dummies
Read the Docs
Read the Docs simplifies technical documentation by automating building, versioning, and hosting for you. Build up-to-date documentation for the web, print, and offline use on every version control push automatically.