A new part of Chebfun has just been merged into the development branch, available from the Chebfun GitHub page: spherefun, for computing with functions on the unit sphere. spherefun is the work of Alex Townsend, Heather Wilber, and Grady Wright and is described in Chapter 17 of the Chebfun Guide. spherefun will become part of standard Chebfun in the next release, which we aim to put out in a month or two.