AltDrag allows you to move and resize windows much easier. When you have it running you can simply hold down the Alt key and then use your mouse to drag any window, and it doesn't matter where in the window you click.
DeskSMS forwards your text messages to your GMail, Google Chat, and DeskSMS Chrome and Firefox extension! And if you reply back, the recipient gets a text from your number!Discontinued
The app seems no longer maintained: it is no longer on Google Play Store and the site http://desksms.appspot.com/ doesn't work. The APK can be downloaded from http://www.clockworkmod.com/ and the source code can be found at https://github.com/ClockworkMod/DeskSMS
GTalkSMS enables you to control your android phone through Google Talk/XMPP (send/receive SMS, make calls, locate your phone via GPS, activate WLAN or Bluetooth, etc.). It can be useful for those who prefer typing sms on a real keyboard.