GitBook - Modern Publishing, Simply taking your books from ideas to finished, polished books.
userinput.io - Get on-demand feedback for your app, website or idea. Learn how to improve by hearing real opinions.
MkDocs - Project documentation with Markdown.
UX Timeline - See how some of today's best companies have evolved
Docusaurus - Easy to maintain open source documentation websites
UXReality - UXReality: One App Instead of Lab