avast! Virus Cleaner is a free tool that will completely remove selected viruses from PC.
It is able to stop viruses that are active in memory, it will disinfect your files, remove virus registry & startup items, and virus working files.
Currently, it can handle these virus families: Badtrans, Beagle, Blaster, BugBear, Ganda, Klez, MiMail, MyDoom, Nachi, NetSky, Nimda, Opas, Parite, Sasser,Scold, Sircam, Sober, Sobig, Swen, Yaha,Zafi incl. var.

Webroot Beagle Remover is a free utility that can quickly scan your system to detect and remove the Beagle worm. This lightweight, downloadable application runs without installing any components on your system and passes results of the scan to a Webroot hosted web page. For comprehensive results, including recommendations for preventing future infections, the tool should be run with an open Internet connection.

Detects and removes many worms, trojans and backdoors: Mytob, Mydoom, Beagle, Netsky, Sasser, Blaster Zafi, Startpage
Switches
/G - Don't check the AVK Monitor status (optional)
/N - Scan mapped network drives (optional)
/I - Do NOT remove Internet temporary files and Cookies (optional)
/D - Delete specified file, path required (optional)

More info: http://wirusy.antivirenkit.pl/

A free beagle screensaver.