Also included now are Solidworks sketch blocks created by team 4183 (Bit Buckets), and Versaplanetaries that have almost every configuration you could want created by Kevin Ainsworth of Pwnage FRC#2451.
CAD.Spectrum3847.org will take you to our Grabcad Partnerspace
The github version of the library is located here.
Let us know if there are models that you want added or how we can improve the library.
Source: Spectrum 3847 Build Blog