I'm unabashedly a Gmail fan, and have been using it for years. One of the things I love about it is its ability to search through a huge number of messages, and find exactly what I need quickly.
But what if I told you there's a way to make searching your Gmail even faster, and that it wasn't Google that did it?
CloudMagic is a Google Chrome and Firefox extension which indexes your email locally on your computer, and provides ridiculously fast results when you search. The extension provides a CloudMagic search field right in Gmail with a shortcut key of Ctrl-/ (rather than just / for Gmail's regular search field). It features search-as-you-type that seems to react instantly to your keystrokes, and uses many of the same search operators that Gmail already uses, so you don't need to re-learn how to search.
From a privacy standpoint, CloudMagic creates the index locally on your machine, so there's no risk of someone snooping through your messages. It also stores your password locally, much like a regular email client does.
It's not clear to me what CloudMagic's revenue plan is, but I sure get a kick out of the idea of someone coming along and beating the pants off Google at search in Google's own email service. CloudMagic reports that Google Docs search is the next feature they will be releasing. I can't wait.