What are some alternatives?
When comparing GitBook and ReadTheDocs, you can also consider the following products
Atlassian Bitbucket Server - Atlassian Bitbucket Server is a scalable collaborative Git solution.
MkDocs - Senaste Tweets från Tom Christie (@_tomchristie): "Another positive habit: Getting back into the Uke. Have that satisfying calloused feeling again now, like the fingertips on my left hand have been dropped in wax and dried.
Visual Studio Team Services - Visual Studio Team Services (VSTS) provides unlimited Git hosting, cloud build for CI, agile planning and continuous delivery.
Doxygen - Doxygen is a tool for generating documentation from annotated C++ sources, as well as other popular...
GitHub Desktop - GitHub Desktop is a seamless way to contribute to projects on GitHub and GitHub Enterprise.
Sphinx Search - Sphinx is an open source full text search server, designed with performance, relevance (search quality), and integration simplicity in mind. Sphinx lets you either batch index and search data stored in files, an SQL database, NoSQL storage.