Technology Professionals Networking Group (TPNG), http://finance.groups.yahoo.com/group/Phillyleads/
Philadelphia Area New Media Association (PANMA), http://www.panma.org/
Innovation Philadelphia, http://www.innovationphiladelphia.com/
PhillyStartupLeaders Happy Hour http://phillystartupleaders.org/content/events/
Ladies who Launch Ladies Who Launch
Philly Startup Hackathons, http://www.groupomatic.com/haqsm3vj
Philly Lambda, http://groups.google.com/group/philly-lambda/?pli=1
Hive 76, http://www.hive76.org/
Refresh Philly, http://www.refreshphilly.org/
Philly ACM SIGCHI, http://tech.groups.yahoo.com/group/phillychi/
Specific Technology
Philadelphia area Linux User Group (PLUG), http://www.phillylinux.org/
Philadelphia Ruby User Group, http://phillyrb.org/
Philadelphia Area Java Users Group, http://phillyjug.jsync.com/
Philadelphia Flash Platform Adobe User Group, http://www.pfpaug.org/core/
Philly ALT.NET, http://phillyalt.net/
Philly Spring Users Group, www.psug.org
