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, Jeremy Beaulieu, James Bullard, Otto Cordero, Éric Durand, Olivier François, Rich FitzJohn, , Jos Käfer, Bret Larget, Naim Matasci, Nick Matzke, Michael Phelan, Elizabeth Purdom, Dan Rabosky, Filipe Vieira, Tim Wallstrom, Li-San Wang, Yan Wong, Peter Wragg, Janet Young, and Jinlong Zhang. 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).