A GNU Make Quine - This is a quine written for "make", specifically the gnu version. - http://japple.freeshell.org/code/quines/
Quines - An essay on quines, programs which produce their own listing as output. - http://www.madore.org/~david/computers/quine.html
The Quine Page - Examples of self-reproducing programs in various languages, with some extensions, including polyglot quines, iterating quines, and quine generators. - http://www.nyx.net/~gthompso/quine.htm