Disney CEO Bob Iger confirmed in an interview on CNBC that the recently acquired Lucasfilm is working on two stand-alone Star Wars movies in addition to the new trilogy.  The two films are being written by Lawrence Kasdan and Simon Kinberg (who had previously been reported to be working on later films in the trilogy, see "Kasdan and Kinberg for 'Star Wars'"), Iger said.   
The character at the center of the first of these stand-alone films will be Yoda, according to Ain’t It Cool News.
J.J. Abrams was recently signed to direct Episode VII (see "J.J. Abrams to Helm New 'Star Wars' Movie"), which is being written by Michael Arndt (see "Arndt Confirmed as 'Episode 7' Screenwriter") and will be released in 2015. 
Iger said that Kasdan and Kinberg are both working with Abrams as consultants on Episode VII.