Apparix is a system to use bookmarks for file system locations in bash and zsh. You can jump to tagged directories and their subdirectories, have easier copy commands, use distant listing and distant editing and anything else where a file system location tag is handy. This all works transparently with tab completion on subdirectories of the bookmark.
Apparix is nowadays implemented in a single sourceable shell script file that supports both bash and zsh. For more information, visit the