pslib is a C-library to create PostScript files on the fly. It offers many drawing primitives, inclusion of png and eps images and a very sophisticated text rendering including hyphenation, kerning and ligatures. It can read external Type1 fonts and embed them into the output file. It supports pdfmarks which makes it in combination with ghostscript's pdfwriter an alternative for libraries creating PDF.
The library is available as 32-bit and 64-bit: