Drop Catch Software & Domaining Tools

Have you had any good/bad experience with drop catching software or domaining tools?
Do you have any reccommendations? Any to buy or avoid?
Which can save the expense of online dropcatching services (and what software do they use)?
Are any of the following worth getting?

DesktopCatcher
Domain Auction Sniper
Domain Hunter Gatherer
Dom Recovery Pro
DomainReaper
Exact Match Domain Finder
eXdomain Pro
Expired Domain Miner
Magic Web Finder
Saper Pro
SubRepo

Any others?

(If there's already a software/tool review thread with regular updates that I'm missing, please advise. Thank you.)