IZArc is good software. It's a Windows compression program that replaces WinZip, 7-Zip, WinRAR, and whatever other nightmareware you might have installed.
File compression is commodity software. You only need two things: a humane UI and decompressors for whatever files you may come across. IZArc is the first program to have both required features. It supports all the formats you might care about (in particular: zip, rar, ace, 7z) and it's got a nice clean UI. I never even launch the program anymore, it's boiled down to a single shell extension command: "make new folder and extract contents".
Oh yeah, and it's free. $25 suggested donation, but no more guiltily skipping nag screens if you are cheap.