The following persons and institutions helped in the development of APE at one stage or another. Many users gave important feed-back with their encouragements, comments, or bug reports: thanks to all of you! Significant bug fixes were provided by Cécile Ané, James Bullard, Otto Cordero, Éric Durand, Olivier François, Rich FitzJohn, Bret Larget, Nick Matzke, Michael Phelan, Elizabeth Purdom, Dan Rabosky, Klaus Schliep, Tim Wallstrom, Li-San Wang, Yan Wong, Peter Wragg, and Janet Young. Contact me if I forgot someone. Kurt Hornik, of the R Core Team, helped in several occasions to fix some problems and bugs. Financial support was provided in the early development of APE by the French "Programme inter-EPST Bioinformatique" (2001-2003). Financial support was provided by the Department of Information Systems of IRD in form a "SPIRALES" project (2006).