Write or Die - Write or Die is an application for Windows, Mac and Linux which aims to eliminate writer's...
Docusaurus - Easy to maintain open source documentation websites
4thewords - Write more, have fun. We’re a writing software that blends productivity and game mechanics so you can defeat writer's block and build a consistent writing habit! (We’re like a gym, built by writers, for writers)
Documentation Agency - We write your product or library documentation.
The Most Dangerous Writing App - If you stop typing, all progress is lost.
Devhints - TL;DR for developer documentation