If you're running a website and are trying to minimize the amount of bandwidth being used then one of the things you might be looking at is compressing the images on the site. It may be worth running some of the key images on your site through the Yahoo! Smush.it tool to see what kind of magic it can work on them.

I never thought I'd find a file archiver that I liked better than 7-Zip, but the interface provided by Hamster ZIP Archiver has really won me over. Not only can you compress files as both ZIP and 7Z formats, but it also looks great while it is doing the dirty work.

The free and portable Radical Image Optimization Tool (RIOT) has been an app I've recommended for a few years now (I think I've been using it since about 2008). As the name suggests it focuses on doing one thing, and doing it well: optimizing images. It can compress, resize, adjust, and convert your images in a way that leaves you in control of the end result.

I always find myself amazed anytime I see someone that is still using WinZip. There are so many free utilities out there to choose from, and yet they still choose the one app that either requires you to pay or you have to wait minutes for a nag screen to disappear.