APIdoc - Inline Documentation for RESTful web APIs
Optic - Automate routine programming
Doxygen - Generate documentation from source code
swagger.io - Swagger is an open source RESTapi Documentation Tool.
ng-docx - Ng-docx is a library that automatically generates a documentation page to easily and beautifully view your markdowns.
ProtoForce - ProtoForce redefines the way the APIs and projects are build, speeding up delivery while lowering development and maintenance costs.