"But for SCALE collaboration, we use online apps:
google docs is one. We use Mediawiki for a lot of documentation.
Mailman for the low-volume mailing lists, and poMMo
(http://pommo.org/Main_Page) for the high-volume scale-announce
mailing list. For communications: the usual suspects: Thunderbird
and Evolution clients (with sendmail inbetween, of course) Also
IRC, IM, and XMPP/Jabber.
"We use an Asterisk server for phone conferences and voice mail.
We use SugarCRM for tracking interactions with sponsors, exhibitors
and vendors, as well as some email campaigns. We have a homegrown
registration application that is written using Python, Django, and
MySQL. One area that we haven't managed to convert to FOSS is
graphics; we tried using Scribus several years ago to create the
hard-copy program, but at that time it wasn't robust enough to use.
We'll probably revisit that in the future. We also use WebERP for
accounting. So we're almost completely OSS at SCALE, which is what
you'd expect ;-)"