Very Neat! Fast search of src code is also a personal itch of mine - I also work on site/webapp at let you search source code with mouse click.

http://www.srcmap.org/s/sl.htm/p=about#c=ABOUT

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.