If you’ve ever wanted web application programming to be a little more like desktop application programming then have a look at Sun’s experimental Lively Kernel project.
If you do web site testing on a Mac and would like to use older versions of Safari then you now have the option of using Multi-Safari instead of running ten copies of Mac OS X.
If you play (live?) Second Life then you might be interested in Katharine Berry’s AjaxLife, an AJAX client for the game. You can also find the source on Google Code.
Junction is a new PHP 5 object persistence layer.
A new piece of software has come to my attention today, a Mozilla project called WebRunner that aims to provide an easy way to create site-specific browsers (SSBs). The project is basically an extension on the XULRunner software, which itself is standalone version of the XUL engine that underpins the big Mozilla projects (Firefox, Thunderbird, Sunbird, Seamonkey).