RSS Aggregator for Linux, Windows, and Mac OSX

I have found the absolutely best RSS aggregator ever! I am not a big fan of web-based communications tools (webmail, aggregators, mailing list archives). I prefer desktop apps. Mozilla Thunderbird provides all of these. I really like Kmail and Evolution is great, but being able ot have newsgroups and RSS feeds appear as "Inboxes" in my mail app is perfect.

If you are not 100% satisfied with your mail client, get too much spam, read blogs, use IMAP, or just want a killer app, download and try Mozilla Thunderbird. This is the new standard for all of the boxes I check email from (home, work, store, etc).