GNU GLOBAL
GNU GLOBAL is a software tool for source code tagging to aid code comprehension. It works in a uniform fashion in various environments, allowing users to find all objects declared in the source files and to move among them easily. It is particularly useful for working on projects containing numerous sub-projects and complex syntax trees generated by the compilation process. It is similar to older tagging software such as ctags and etags, but differs in its independence from any specific text editor.
GNU GLOBAL is free software maintained for the GNU project by Shigio Yamaguchi.