Acknowledgements for version 4.x:

• ACoBSEC (FP7-Marie Curie-IRSES 2013, European Commission, contract No.612689)
• MaSSGP (PTDC/EEI-CTP/2975/2012, FCT, Portugal)
• EnviGP (PTDC/EIA-CCO/103363/2008, FCT, Portugal)

A long term acknowledgement goes to my colleagues who have mostly contributed to the developments included in the latest version of GPLAB:

• Nuno Tenazinha (GUI)
• Alberto Moraglio (GDE)
• Leonardo Vanneschi (OpEq)
• Ivo Gonçalves (RST)
• Vijay Ingalalli, Leonardo Trujillo and Luis Muñoz (M3GP)
I'm sure I'm forgetting someone, so I apologize in advance!

Post-2007 Acknowledgements:

• If you ever sent me code, comments or suggestions...
• If you provided any idea, even if just during a casual conversation...
• If I ever made you listen to my complaints about how many emails I receive regarding the toolbox...
• If you ever helped me in any way...
• Consider yourself acknowledged.
Sorry, I can no longer thank each one of you separately -- you're simply too many. Thank you all!

Post-version 1.x Acknowledgements:

• Thank you to Marco Medori and Bruno Morelli for providing a workaround to the "nesting 32" MATLAB error, which I truly hope will be solved by the people at The MathWorks soon.
• A big thank you to Marc Schoenauer's students Flavien Billard, Aurélien Boffy, and Thomas De Soza for spotting the nasty artificial ant bugs, and to Matthew Clifton for the fruitful exchange of ideas and for providing most of the ant simulation code. Thank you all for providing ideas on how to solve the bugs, including the people on the MATLAB newsgroup (comp.soft-sys.matlab)
• Thank you also to all the users who have provided helpful comments, suggestions and useful code, in particular: Henrik Schumann-Olsen, Jens T. Thielemann and Oddvar Kloster from SINTEF, for the extensive additional (and wonderful) code provided; Wo-Chiang Lee for spotting a bad bug; Peter J. Acklam for providing one function, and Mehrashk Meidani, Ali Nazemi, and Vladimir Crnojevic for improving others
• My PhD grant (SFRH/BD/14167/2003, FCT, Portugal)
• The ECOS - Evolutionary and Complex Systems Group at CISUC
• Last but not least, my PhD advisor Ernesto Costa, for allowing me to spend so much time working on the toolbox! :-)

Acknowledgements for version 1.x:

• Project EURIS (QLK2-CT-2000-01020, European Commission)
• Project SAPIENS (POCTI/1999/BSE/34794, FCT, Portugal)
• The Biomathematics Group at ITQB/UNL