FastMM memory manager
Pierre le Riche the author of FastMM describes how it differs from the memory manager previously provided with Delphi.
http://edn.embarcadero.com/article/33416
Alan Bauer details the performance gains that resulted in the Delphi IDE from moving to FastMM.
http://blogs.embarcadero.com/abauer/2005/09/28/21433
Hallvard Vassbotn explains why FastMM was made the default memory manager in D2006 and how to extend it using the full version.
http://hallvards.blogspot.com.au/2007/05/use-full-fastmm-consider-donating.html
Jeroen Pluimers introduces FastMM and explores the options available with the full version.
http://wiert.me/2009/07/29/delphi-fastmm-using-fastmm4-for-debugging-your-memory-allocations-part-1-introduction/
then describes how he uses FastMM to track down memory leaks related to interfaces.
http://wiert.me/2009/08/10/delphi-using-fastmm4-part-2-tdatamodule-descendants-exposing-interfaces-or-the-introduction-of-a-tinterfaceddatamodule/
Alan Fletcher provides some assistance with configuring the full version of FastMM.
http://delphibistro.com/?p=186
Primoz shows how to make some modifications to FastMM to break into the IDE debugger at the time when a memory leak occurs.
http://www.thedelphigeek.com/2012/06/hacking-fastmm-for-debugging-purposes.html
Francoise Piette gives a quick introduction to FastMM and also describes how to use madExcept to find memory leaks.
http://francois-piette.blogspot.com.au/2013/03/memory-leaks-detection.html