I have an upgraded version of Arelis, I just use it for research if you limit it to 20 to 30 links and one search engine at a time it's a super fast way to see who's dominateing a keyword.
Edit pad lite is open 24/7 on my computer.
Here's a couple tools, that are popular in mainstream and allmost make you feel like your cheating.
http://www.thedowser.com/
It has a learning curve, but this keyword tool has balls, I realy didn't know there were so many ways to screw a latina
http://www.webceo.com/
This program pretty much tells you what your competition had for breakfast
compare your site to your competion, Stay with the free version I tried the pro version out, you get a little more info in one sitting but they still charge for their monitering service, and You could spend a fortune just monitering websites with them
http://www.essentialpim.com/
My favorite program at the moment it's the handiest organiser I've ever used only thing I miss is spell check, I'm looking forward to paying these guys