ArchiCad ships with out-of-the box templates that do not address the full functionality of a well-coordinated BIM solution. The purpose of the ACE templates was to create a coordinated GDL library, Master Layer and publisher templates, together with Model View Options, Materials, Fills, Custom Profiles, Pentables and myriad other custom Attributes that synchronized with the CSI (Construction Specifications Institute) index ordering for subsequent integration with spec-writing protocol and quantity-surveying and/or construction modelling purposes.
The most popular, current torrent for the ACE Library can be found here:
Uploaded 03-06 2008, Size 240.2 MiB, ULed by arthomson
Uploaded 03-17 2008, Size 240.86 MiB, ULed by arthomson
Last ACE Library was for ArchiCad 11, but I am still using this library for all projects in 12,1 3, without any issues.