BambooKit for Java Applet GUI

BambooKit packs a good looking responsive GUI toolkit into a 105K jar file that loads in less than a second (0.18 seconds on my laptop).  GUI is specified using XUL-like XML file, making it easy to change and without having to recompile Java code.  While its Look & Feel could use just a bit more polishing (visual quality is uneven across widgets), what you get is vast improvement over generic AWT.

BambooKit runs everywhere Java runs including handheld devices (its certainly small enough to fit into J2ME phones).  It is like a commercial version of Thinlet.  Go check out their online demo (look for the Demos tab which is implemented using BambooKit as well) .  You'll be impressed.