I've signed up to Fandom Aid, to raise funds for the earthquake in Nepal. I'm offering both fic writing (Sherlock, HP and various other fandoms) and beta/britpick/cheerleading services. If you are interested in any of these you can ask for them here.
Alternately, lots of other interesting writers and artists, including the wonderful frozen_delight are signed up too, in Sherlock and various other fandoms. If you think donating this way is something you'd like to do, or if you'd think you'd like to sign up yourself it's worth checking out!