Receive instant notitications about payments pending
Store password for control panels, userful links for every domain
Make short notes about every domain
View whois information for website you currently visit in Internet Explorer
Query DNS records
Never loose domain name because you forgot to pay!
Yes, registar will send you notification emails about pending payments.
But can you bet you will receive those emails?
Do you have SPAM filters configured correctly?
SoftCab Whois will will stay out of your way in system tray area, and notify you about all payments.