Bukkit

6.1.3: Command alias' /mh /mobh and /mhealth to cope with other plugins using /mobhealh
Made "Bar character" editable
Made bar length configurable.
Options to not show bars on NPCs and animals.
Fixed Minor ScoreBoard bugs.

6.1.2: Maintain Custom Mob names
Option to remove healthbars from death messages

6.1.1: Detect scoreboard API and disable new health bars if not found.
Configurable player health label.
Fix for Villager Trade crash.

6.1.0: New healthbars options.

6.0.0: Updated support for Heroes, Like A Boss and Corruption
Added Auto Updater. - Edit config 'doUpdate' to disable.

Side Notification widget need lots more work.  
Frequently overlays messages in busy combats.

Heroes support needs more testing - due to its requirement for non-official CB variant complicating my testing process.  Feel free to ticket if you find issues.