Tipue is an open source JavaScript Site Search engine. It works with any browser that supports JavaScript 1.3 and at least partially supports the W3C DOM Level 1.
Tipue is small and lightweight at less than 7Kb, platform independent and doesn't require any other technologies on your host. It's best suited to smaller sites with less than 100 pages.
Tipue Standard Edition creates and updates Tipue on your site. It indexes your pages and then allows you to update and edit your data file. The scripts along with full documentation are included. Tipue Standard Edition is free and requires Windows 98SE or above.
The Tipue scripts are released under the GPL licence.