Converters from EAGLE to Fritzing file format:
brd2svg converts EAGLE board files (.brd) to Fritzing parts (.fzp/.svg)
lbr2svg converts EAGLE part libraries (.lbr) to Fritzing parts and bins (.fzp/.svg/.fzb)
These are stand-alone command line tools built with Qt. Look into their individual readmes to get started.
Both tools depend on the fritzing-app repository. Make sure you clone this one next to it and keep the original path names:
some_folder |-- eagle2fritzing |-- fritzing-app