- SplashID, part of Splash Wallet: I mentioned that I'm trying this out a little while ago here on Operation Gadget.
- Note Studio: a PalmOS-based wiki with a conduit and a desktop app for both Mac and PC. Definitely worth trying.
- Card Backup: a Palm app that backs up your PDAs main memory to a memory card. I bought an MMC card for this purpose before my trip to Chicago in April, but never used it to store a backup. I think there is a freeware and a more fully featured version of this.
These applications and the others mentioned in Marc's article are great ideas for Treo 650 users who are looking to improve their personal productivity.