Boone Gorges

CUNY Academic Commons

Allows admins to import data from an arbitrary RSS feed into their BuddyPress sitewide activity stream
The plugin imports RSS feeds every hour. You may find that you need to decrease your Simplepie cache time to make it work: 
 add_filter( ‘wp_feed_cache_transient_lifetime’, create_function(‘$a’, ‘return 600;’) ); 
reduces the RSS cache to ten minutes, for example. Put that in your bp-custom.php file if you are having problems with the plugin.
At the moment, the plugin uses the Author field from the RSS feed to look for a matching author in your WP database. If it doesn’t find one, it uses the unlinked text ‘A user’, as in ‘A user edited the wiki page…’.

BP External Activity

Allows admins to import data from an arbitrary RSS feed into their BuddyPress sitewide activity stream

Dan Griffiths

Adds a robust third-party product system to Easy Digital Downloads. When activated, adds new fields to the Download Prices meta box allowing you to specify redirect details.
External Products is based on the extension of the same name by WebDevStudios.

Easy Digital Downloads – External Products

Was looking for exactly this: an option to add third party plugins on my own EDD shop. 

Perfect

Adds a robust third-party product system to Easy Digital Downloads

BP External Activity vs Easy Digital Downloads – External Products