Tunes - Tuneflow

Mac OS X only: We've been fans of Quicksilver for years, but the universal application launcher and-then-some hasn't been in active development for a while. Alfred aims to pick up where Quicksilver left off.

Windows only: One of the biggest bummers about iTunes is its lack of hotkey support—HKTunes is a free, open-source system tray utility that lets you define custom hotkeys for basic iTunes functions, such as play/pause and track changes.

Firefox/Chrome: If you love using your keyboard and shun your mouse, you'll definitely want to try gleeBox, an awesome add-on that lets you effortlessly browse the web without your mouse. Check out the video inside to see it in action.Click on the picture above for a closer look.

If you're a fan of universal memory service Evernote, but can't or won't run its desktop software for quick access, the service suggests making Evernote.com easy to search from the address bar.Evernote's team explains the process in the video above, but it's also easy to describe in text. Right-click on Chrome's address/OmniBar, select Edit Search Engines, and hit the Add button in the next dialog. From there, enter these results into the three fields:

Firefox is the most extensible web browser around but you don't even need to install any add-ons to take advantage of the numerous shortcuts that make tabbed browsing even better.

Now that Google's Buzz social network has learned from its mistakes, more users might be keen on actually giving it a go. The Google Operating System blog has a great power user's guide to the finer points of Buzz.

Imagine typing the same few keystrokes from any browser to email or clip a page, or start any kind of search. Quix is a universal browser commander, on your desktop or mobile, and it's my favorite new timesaver. Here's how it works.

Windows 7 has a lot of neat new features (such as Aero Peek) that help you see what's behind a window, but reader Verygoodyear shares a very simple, one-key solution for any Windows version that, surprisingly, is new to us.

We recently showed you how to add Bit.ly URL shortening to Quicksilver, and now reader Kevin has made an AutoHotkey script so Windows users can enjoy quick, keyboard-based URL shortening.

Gmail is easily the most popular email application among power users, and with good reason: It's an excellent app. But if you haven't gotten to know its best shortcuts, tricks, Labs features, and add-ons, it's time you made Gmail sing.Photo remixed from Google's own Become a Gmail ninja page.