Lace is PHP script for running a simple chat on your own website. Lace is a free Ajax chat application. It takes advantage of Ajax (XMLHttpRequest) if present, and degrades gracefully if it is not.

Changes in Lace 0.1.4
Scrollable message history
Basic anti-flood protection
Basic nickname hijack protection
System messages now optional
Unicode fixes
“Line 655&Prime bug fix
Many speed improvements