GitBook - Modern Publishing, Simply taking your books from ideas to finished, polished books.
DisplayFusion - DisplayFusion will make your multi-monitor life much easier.
MkDocs - Project documentation with Markdown.
Mizage Divvy - Divvy is an entirely new way of managing your workspace.
Docusaurus - Easy to maintain open source documentation websites
WindowGrid - Quickly and easily layout windows on a dynamic grid using just the mouse.