Prototype.js Add-ons

I came across some add-ons based on Prototype. Here a small list:

TableKit: http://www.millstream.com.au/view/code/tablekit
Create sortable, resizable and editable tables

Control Suite: http://livepipe.net/projects/control_suite/
From the website: "Collection of six high quality widgets and controls for Web 2.0 applications built using the Prototype JavaScript framework"

Tidbits: http://livepipe.net/projects/prototype_tidbits/
Odds and ends for the Prototype framework

Window: http://prototype-window.xilinus.com/
Resizable/model/skinnable overlay window.

LightWindow: http://stickmanlabs.com/lightwindow/
Skinnable overlay window with many possibilities