These files are in Dropbox becuase GIT suggest to put large files there: https://www.dropbox.com/sh/aq1f1i2im15gmkn/AABLYcjf3KJm35So9ixRlbUHa?dl=0
Dump of files from EAGLE project in EpiDoc: you can get these one by one from the EAGLE website, or get everything which is fed to EAGLE from the above folder.
NOTE THAT THESE FILES ARE NOT STABLE NEITHER DEFINITIVE AND KEEP BEEING A WORK IN PROGRESS! They are also automatically convered or updated. So please, refer to the original websites for the authoritative version. Nevertheless you could find handy to start your project from some or all of these exported files.
The mapping of most databases can be found in this old table: https://goo.gl/VNxFDs
Lists of comparing IDS can be found here: in https://github.com/EAGLE-BPN/EAGLE ids
This files arrive to EAGLE in different formats and are then transformed using different conversion tools, most of which are stored here: