ExtractNow is a simple utility that allows you to extract multiple archives quickly and easily. ExtractNow is not a complete archival solution. It's main purpose it to allow the user to extract multiple archives easily. Free / Donation-ware.
7-zip is another great free utility that handles .rar files. Cannot create .rar however.

There is a list of other tools at freedownloads center, or you can always use Google...