Brendon Crawford has updated both of his products, AJForm and ReJax.

AJForm:

AJFORM is a JavaScript toolkit which simply submits data from any
given form in an HTML page, then sends the data to any specified
JavaScript function. AJFORM degrades gracefully in every aspect. In
other words, if the browser doesn’t support it, the data will be sent
through the form as normal.

New Features:

• Improved performance support. Able to handle many simulateous
  requests without problem.
• Added a powerful event handler library for standardizing mouse
  event properties

Rejax

As the first online Regular Expression tester to offer realtime
highlighting and offering more languages than any other online
tester, ReJax continues to be the coolest and easiest to use Regular
Expression tester on the web.

New Features

• Support for 6 different Regular Expression engines
  1. Javascript
  2. PHP 5 PCRE
  3. PHP 5 POSIX
  4. Ruby
  5. PERL 5
  6. UNIX Shell Patterns
• Instantaneous realtime pattern matching
• Global matching support
• Improved easy to use interface

source: ajaxian