This is probably more of a niche post, since most people do not have the need to start their own community / social network, I however thought that I would post the deal, since it is a very powerful website script, great value for money, and developed by Aussie's!
If you have no interest in purchasing the script, you may still have some fun trying out the demo's.
3 DAYS ONLY
Standard license: $279 (was $399)
Prime license: $559 (was $799)
USER DEMO: http://demo.boonex.com/
username: kangaroo
password: dolphin
ADMIN DEMO: http://demo.boonex.com/administration/
username: admin
password: dolphin
You can read about the script's MANY useful features here: http://www.boonex.com/features
iOS app: https://itunes.apple.com/us/app/oo/id345450186?mt=8&ign-mpt=…
Android app: https://play.google.com/store/apps/details?id=com.boonex.oo
Suggest reading a little into this before buying - http://www.boonex.com/forums/#topic/why-is-it-so-hard-to-con… and the apps btw are only included in the top package not the one listed in OP.