One of the best things with Windows is the ability to quickly lock your computer with the Win+L. Really nice if you have to leave your computer unattended.
The mac lacks this feature out of the box.
But you can mimic this with a small pref.pane called LockTight. I have been using is for a long time and I can really recommend it.
When people “Switch” to the Mac, they often look for a one-keystroke or one-key-combo screen locker.
And they’re often disappointed to find that the operating system only provides a two-click solution: add the Keychain Access menu item to the menubar, and then use “Lock Screen”.
…but it doesn’t work under Mac OS X for Intel-based hardware. Until now…because I got frustrated with myself for not having done it earlier…
Presenting the Intel-compatible re-compile of LockTight.
Menno’s source code has been recompiled with XCode on an Intel based Macintosh, and contains all the original source code and licensing information as required.
Snow Leopard (Mac OS X 10.6.x) Update (31 August 2009): LockTight for Intel (v0.1.1)