Still in love with CDisplay. I love it almost as much as I love Firefox. Considering how much I love Firefox, that is saying something. I only recently discovered that it has a "Japanese mode" apparently designed to read manga. I need to dig a little more to see what it actually does, but overall, it's a brilliant program. Incredibly configurable, yet sleek and easy to use. Dude, you guys just have to check it out.
Speaking of Firefox, I've been digging Scrapbook, which is cool for organizing and saving pages (like fic).
Also, There's a beta version of Google Toolbar for Firefox (an official one, not Googlebar, though I do recommend checking that one out, too). I haven't tried it yet, but it looks nifty. I may have to in the future.