toy-autojump is a toy-like tool to navigate you filesystem based cd commands you have executed in the past.
It's incredibly simple to use. Just copy the content of autojump file into ~/.bashrc and source ~/.bashrc, then you can use j dir to change the working directory to dir. It may be fail or change to a directory that is not your expected. However, the longer you use it, the more accurate it will be. Welcome to improve it.