What are some alternatives?
When comparing Sphinx Search and Doxygen, you can also consider the following products
GitBook - Modern Publishing, Simply taking your books from ideas to finished, polished books.
Slate API Docs Generator - Create beautiful, intelligent, responsive API documentation.
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.
ReadTheDocs - Spend your time on writing high quality documentation, not on the tools to make your documentation work.
ElasticSearch - Elasticsearch is an open source, distributed, RESTful search engine.
Natural Docs - Natural Docs is an open-source documentation generator for multiple programming languages.