Gallery:
*Non-commercial: JoomGallery (
extensions.joomla.org/component/option,com_mtree/task,viewlink/link_id,5481/Itemid,35/)
*Commercial: SimGallery (
extensions.joomla.org/component/option,com_mtree/task,viewlink/link_id,5782/Itemid,35/)
both only in legacy mode. Fully compatible with CB profiles. I use JoomGallery for my community because you need Ioncube on your server for SimGallery. Here's an example:
www.wow-wildtiere.com/galerie?func=viewcategory&catid=1
To show 'New members', 'Most visited profiles', etc. on the frontpage, you can use the commercial modules from Software4Joomla:
www.software4joomla.com/ Each cost 3-4 Euros, I think this is a moderate price. But they aren't flashbased.