I've been working on another tool, http://crossclj.info focused on cross-referencing a large parte of the open-source ecosystem for Clojure and ClojureScript (some 3600+ projects).
You can browse both the source code (jumping to definitions across projects) and the auto-generated docs of the whole codebase.
It cross reference of any strings in any text files inside a project.
I indexed the linux, bsd kernel, android AOSP (JB), openstack, golang, raspberrypi_userland, elasticsearch, nodejs and few other projects with it on that site.
I've been working on another tool, http://crossclj.info focused on cross-referencing a large parte of the open-source ecosystem for Clojure and ClojureScript (some 3600+ projects).
You can browse both the source code (jumping to definitions across projects) and the auto-generated docs of the whole codebase.