Stino does a really nice job of integrating Arduino into Sublime. The default IDE for Arduino is horrifying; if you do much more than copy and paste a few sketchbook examples, you'll probably be looking for a way to get Arduino development working in your favorite text editor right away.

In Sublime's case, any time I'm working on a ".ino" file, I get an "Arduino" menu added to the menubar, which gives me all of the options needed for compiling & uploading code to the Arduino &etc.