Imgburn

ImgBurn carries on from where DVD Decrypter left off! ImgBurn can write most types of CD and DVD images and it supports all the latest writers (including booktype and bitsetting on many of the major ones -- i.e. BenQ, LiteOn, NEC, Plextor, Sony). You can even use ImgBurn to erase and format your rewritable media! ImgBurn will try its very best to burn your DVD-Video double layer images using the layer break you've specified in the IFO files, but it can also calculate the best place for you, to save you the trouble. Advanced functionality can be found in context menus that appear when you right click on various bits of the user interface.

http://imgburn.com/

Regshot

Regshot is a small, free and open-sourced registry compare utility that allows you to quickly take a snapshot of your registry and then compare it with a second one. In addition, you can also specify folders (with sub folders) to be scanned for changes as well .

http://regshot.blog.googlepages.com/regshot.html