So far I have been really lucky with the programs I have added to my Treo 755P. These are all programs I had on my TX so likely they are stable with the Palm OS5. I believe I have all the latest versions installed. I did not have a Treo before so now I have to trial some of the Treo applications. Applications: Uninstall Manager Resco Explorer Resco Backup Holiday USA Chagim Checklist Ereader Mobipocket Fontsmoother Handy Shopper Pocket Tunes Deluxe- must be the latest version 4.0.2 Watchmaker Zlauncher NVBackup disappeared from the Treo during the first day, not sure how. I have reinstalled it and it seems ok so far. I am currently backing up with both NVBackup and Resco Backup. Resco nails the cache pretty good on the Treo too.