Codex Home → Getting Started → Customizing
Customizing
There are various ways to customize your BuddyPress site:
BuddyPress plugins in the WordPress.org repository
create your own plugin or
develop a custom theme
The BuddyPress forums offer up many code snippets and solutions from the community to help you add that extra functionality.
External Resources
http://wordpress.stackexchange.com/questions/tagged/buddypress