Open Source Folder Compression Utility -- 7 Zip
If you need a free tool to open zipped files, tar files, or other types of compressed folders, and to likewise zip folders yourself, check out 7 Zip. I've been using it for a month now (after my Power Archiver trial ended), and I've found 7 zip does everything I ever need it to -- and it's free.
Here's their site: http://www.7-zip.org
About Tom Johnson
I'm a technical writer / API doc specialist based in the Seattle area. In this blog, I write about topics related to technical writing and communication — such as software documentation, API documentation, visual communication, information architecture, writing techniques, plain language, tech comm careers, and more. Check out my API documentation if you're looking for more info about that. If you're a technical writer and want to keep on top of the latest trends in the field, be sure to subscribe to email updates. You can also learn more about me or contact me. Finally, note that the opinions I express on my blog are my own points of view, not that of my employer.