This may be a bit late, but I've found both Crimson Editor, and JEdit to be rather nice. If you're dealing with a lot of stuff, especially in upgrades, Beyond Compare is extremely helpful as well.
Donate to UBBDev today to help aid in Operational, Server and Script Maintenance, and Development costs.
Please also see our parent organization VNC Web Services if you're in the need of a new UBB.threads Install or Upgrade, Site/Server Migrations, or Security and Coding Services.
