Top meeting last night, welcoming lots of new faces and our returning experts. We talked about some favoured extensions, from the humble to the mindbending...

Here's the list:
LQM - database application and query builder
JoomlaWorks Simple Image Gallery PRO
EM slideshow - Ajax slideshow emulating Flash
Joomlapack - site backup manager
Slink - extension hooking Joomla extensions' invoices to saasu.com online accounting (written by our own Barnard Tai - hooray!) Bernard feel free to add more detail!
JUGA - Access Control with lots of very nice features, frontend and backend ACL
MagicUpdater - to upgrade your Joomla

Am a bit pushed for time, or i'd put up all the URLs...

Thanks to all for relating your experiences