Plugins
Aviable Plugins Jar File Calendar_J.jar (153 KB) and add to ImageJ2x/plugins directory.
Aviable Plugins Jar File command_bar.jar (192 KB) and add to x/plugins directory.
Aviable Plugins Jar File color_picker.jar (13 KB, ImegeJ plugin) and add to x/plugins directory.
Tools
Download API File JCalendar.zip (473 KB).