A debug heap for *nix. Captures buffer overwrites, memory leaks, stale pointers, most buffer underflows, and can provide statistics on block sizes. http://i1.dk/idh/
A collection of papers on garbage collection, memory allocation, and the like from the OOPS Research Group at the University of Texas at Austin. Includes papers from the OOPSLA Workshops on Garbage Collection in 1990, 1991, and 1993. ftp://ftp.cs.utexas.edu/pub/garbage/