Kids Donations , a group that helps provide clothing, toys, and other necessities to children and their families that are suffering from disasters, poverty, illness, ect.
While the charity may be focused on kids...the calendar is planned to be a bit more adult in content. Each month is going to be a pinup (Note: not porn, more like swimsuit) of a specific "humanized" pony.
While the topic of humanized pony may not be for everyone, it is still a massive project. If you have followed the drawfriend posts on the site at all, you were probably exposed to the majority of their art. John Joseco alone has been known to literally fill up half a post.
For more information, check out the fimchan (Note: Fimchan is known for being non-worksafe) thread, and the artist list+Cheerilee example after the break!
Contributing Artists (Some nsfw links)
Cover- John Joseco- Celestia
January- Sugar Plum- Berry Punch
Febuary- Chinadoll- Octavia
March- Elosande- Carrot Top
April- Jack- Applejack
May- Megasweet- Fluttershy
June- Thelivingmachine 02- Luna
July- Empty10- Derpy
August- Low Key- Vinyl Scratch
September- No Ink- Twilight
October- CartoonLion- Pinkie Pie & Rainbow Dash
November- Carnifex- Rarity
December- Yamino- Trixie