Edit a personal profile
add about me field (via userprofile)
add profile picture (via fe_manager)
add address data (via fe_manager)
add GitHub link (via t3o_my)
add twitter (via t3o_my)
add facebook (via t3o_my)
It is already possible to "get in touch" for a given extension. The link typically points to the Forge (or Github) project because this is what is suggested in the projet settings.
However, many extensions do not have any public projet page and sometimes it would be really useful to "simply get in touch" with an author (the responsible person) using social networks (typically Twitter) instead of creating tickets (if possible at all) or writing email (which nowadays annoy everybody).
So the proposal is to have social links (at least Twitter) associated to fe_users, that is extension key owners. And the link(s) should be visible on or next to the owner username in detail page of an extension.