This is about the addons ElkGuild and ElkFriends, both originally from author Elkano.
I believe around WoW 4.0 they totally stopped working and only ElkGuild was updated ever since (last dec 2010). So I decided to rewrite ElkFriends from scratch, heavily based on ElkGuild so it would look, feel and behave very similar. In the process, I also added several missing features to ElkGuild.
They are now finished addons, both working flawlessly; I've been using them myself for several months, fine-tuning and polishing, and want to share them with others.
I've already tried to contact Elkano via the WowAce and Curse PM system, but I'm afraid he's not monitoring those anymore. I'm unable to update the existing projects (ElkGuild is on curse, but ElkFriends only exists on wowace), and don't want to use a different name since I feel I should keep credits to Elkano for the original idea and looks.
Generally when you want to take over a project (or use code from a project), you should click the report icon on the project page (look for the microscopic red triangle with an exclamation point, attached to the lower right corner of the browser viewport), select the "Requires Moderator Attention" category, and explain what you want to do.
That said, Elkano was last active on the forums 4 hours ago, so he's certainly around. Have you tried looking for him on IRC?