- If you use a Mac, there's no better than Alfred, that I've ever found. Hotkeys, keywords, text expansion and more. Search your Mac and the web, plus custom actions to control your Mac. It's awesome.I have been using Alfred for quite some time now... and it solves a lot of things for me on a mac, with a power pack. Amazing replacement for spotlight with power features, keyboard shortcuts, for email templates and code snippets. I even replaced some of my bash alias with Alfred shortcuts.
- Not really a tool but if you are code or even if you just need to take notes, you can use sublime and this tutorial is excellent. It teaches you the most useful shortcuts in app. I also recommend TextExpander (suggested by @loralleehutton)