The PNG book: http://www.libpng.org/pub/png/book/toc.html
The GNU Make book: http://oreilly.com/openbook/make3/book/index.csp
The Subversion book: http://svnbook.red-bean.com/
The Cathedral and the Bazaar: http://www.catb.org/~esr/writings/cathedral-bazaar/
And I haven't read it, but I would guess "Making TeX Work" is still relevant: http://makingtexwork.sourceforge.net/mtw/
The PNG book: http://www.libpng.org/pub/png/book/toc.html
The GNU Make book: http://oreilly.com/openbook/make3/book/index.csp
The Subversion book: http://svnbook.red-bean.com/
The Cathedral and the Bazaar: http://www.catb.org/~esr/writings/cathedral-bazaar/
And I haven't read it, but I would guess "Making TeX Work" is still relevant: http://makingtexwork.sourceforge.net/mtw/