I was trying the new editor by Github called Atom, and I was a little annoyed that when I closed it and re-opened it, it didn't just open where I left off, like Sublime Text does. However, since I'm usually in the command line anyway, I realized that if you use the
atom command in your command line from within a project directory, it will launch Atom for that project as you last used it. Pretty sweet.
→ cd ~/Sites/my-project
Launches Atom with your project in the sidebar.