DynaBar is a dynamic bar that anchors itself to the top or bottom of your web page and scrolls along with your page.
It has a second mode that allows “fixed” positioning in your browser window (i.e. doesn’t jump around as you scroll).
DynaBar is a resurrected version of Dinabar, originally written by Andrea S. at joomlovers.net. Unfortunately their web site/business has been discontinued, leaving DinaBar orphaned.
This new version is a cleaned-up version of the original, with more options, and the “fixed” window position option.
Dynabar, like Dinabar, is released under the GPL.