JK Defrag appears to have now become My Defrag which might be appropriate for inclusion
http://www.kessels.nl/JkDefrag/index.html
(The following is taken from his webpage.)
The long-awaited version 4 is finally out. The program is now called "MyDefrag", because it has a scripting language and you can customize just about every aspect of it. It is no longer the "JK" (Jeroen Kessels) defragger, but "my" (your) defragger!
Fully functional freeware.
Higher speed.
Better optimization.
Lower memory usage.
.... and more!