Celestia Medium

Celestia Medium is a "knockoff" of the font used in My Little Pony Friendship is Magic logo, Generation B.

Generation B
The actual font used in Friendship is Magic logo and promotional material is Generation B, created in 2009 by Harold Lohner. The font was inspired by the opening title of the movie The Parent Trap (1961) as well as other movies from the 50s and 60s. The font is available for purchase.

Celestia Medium
On February 20, 2011 a PNG image featuring all basic letters from Generation B was posted on Equestria Daily. An ED user called Purple Tinker traced them and created a font, which she called Celestia Medium. New versions with more characters were posted on her deviantART account. The font has been criticized for being basically a copy of a commercial font and the author ultimately took it down.

Celestia Medium Redux
For a while it seemed that development of the font had ended. However a deviantART user Mattyhex took Celestia Medium files (released by Purple Tinker to public domain) and edited the letter shapes to make sure that they are noticeably different from Generation B, while preserving the feel of MLP logo. Version 1.5 contains both upper and lower case Latin glyphs, the Cyrillic and Greek glyphs, as well as many national characters absent from original font. Celestia Medium Redux, like its predecessor, is available for free.