At first it seems Its cheaper than most of the competitors but without all the extra modules its very limited. With extra modules sometimes costing more than moosocial, the costs go into thousands of dollars very quickly. If you want to take Stripe as we do, thats extra. If you want a blog, thats extra. If you want to backup your data, thats extra if you want to have social media logins, thats extra. If you want the mobile apps thats extra.
SocialEngine - Socialengine PHP: Elevating Your Online Community Experience.
JomSocial - Open Source Social Networking Software. Award winning open source community software by JomSocial. This social networking software is widely used by many Joomla users.
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EasySocial - Social Network For Joomla to grow your communities with the least time.
Elgg - Opensource social network engine
Diaspora - The online social world where you are in control.