MalwareBytes Anti-Malware is one of the best malicious software removal tools available.
SUPERAntiSpyware is another excellent malicious software removal tool. Plus, it comes in a portable version.
ComboFix is great at root kit removal.
While CCleaner is not a malware removal tool, it is great at cleaning up junk before purging a system of malicious software. It also has an excellent portable version.
Another Live CD to add to your collection is Ubuntu. This user friendly Linux distribution includes a long list of tools as well. Plus, you can install additional software as needed.
A great companion to nLite is DriverPacks. With DriverPacks you can slipstream drivers for practically every hardware device under the sun. You can also create a stand alone disk for updating drivers.
Best for last...
Do you have any favorites that are not listed? Let's hear about them. Leave a comment.