Here is a list of Mods that are available for the Thunderbolt. Each mod links to the thread for the mod with instructions and files.
Some of the items listed here are not for the novice user. Please don't install these mods on your device unless you are familiar with how they work and how to install/uninstall them. We make no guarantees concerning these mods, we are simply just passing along the information. Please know that if you install these mods you do so at your own risk.
Add Radio Info to Wireless Settings: this mod will allow you to add the radio info (phone info) to your wireless settings menu for ease of toggling 4G service.
Advanced Power Options: this mod will allow you to add several advanced options to your shutdown menu.
AppPickerWidget: group your widgets by packages when picking a widget for the homescreen. Note: currently this works on alternate launchers only.
Better GPS: this mod allows you to improve the reliability of your GPS
Enhanced Browser: this mod will free your browser from the 4 page limit.
Flash 10.2 Working HULU: watch HULU on your T-bolt
Power Control Widgets: put power controls in your notification bar, port from Galaxy S phones.
Remove Sense Lock Screen: replace the Sense lock screen with ASOP Android lock screen.
sd Speed increase: speed up your sd card.
If you find that any of these are not working or if you find any additions to this list please let me know and I will make the corrections to this op.