ImgBurn is a great little CD / DVD burning application and can be found via the official site at http://www.imgburn.com. It's also free, so if you use it, please support them via their PayPal link.
With that, it's really kind of difficult to download a current copy without clicking through several mirror site pop-ups and using suspicious third party installers.
If you don't need the latest version, you can find and older SetupImgBurn_184.108.40.206.exe file here: https://docs.google.com/viewer?a=v&pid=sites&srcid=ZGVmYXVsdGRvbWFpbnxyYXltYXNsYW5rYXxneDo0NDU5MzI1Y2YwZTk0OWZk
It appears to be the latest 2.4 version, where the latest release as of now is 2.5.8.