Not Autotools is collection of awesome and self-documented m4 macros for GNU Autotools. The macros are organized by topic and each topic has its own file. Most of the macros are independent from each other, so you can just copy and paste what you need. The few cases where a macro depends on a helper macro are documented.
Embedthis MakeMe is a modern replacement for make and autoconf. It manages the building of programs and products by direct compilation and the generation of IDE projects and Makefiles. MakeMe can portably build programs for Linux, Mac and Windows and handles cross-compilation with ease.