W4SUL is a happy user of XMlog. A simple, clean and powerful logging interface with rig control. Visit xmlog.com for more information.

For Cluster software try RDXCluster It's very powerful, and you can even program it to send your cell  phone an email when that rare DX shows up in the spots! (By envoking a .bat file to run Blat or other mailer. Works great, thanks Roberto IK4JPN!)