pstoedit--a tool converting PostScript and PDF files into various vector graphic formats. Use 'man pstoedit'
Epstool--Create or extract preview bitmaps in EPS files. Also generate %%BoundingBox
epssplit--a program for splitting an encapsulated postscript file, for posters or similar.
ImageMagick -- a collection of image processing tools
jpeg2ps-- convert JPEG compressed images to PostScript Level 2