I prefer EagleUP for quick model generation, and it has a decent library to start. The author is responsive to feedback, so I’m surprised it hasn’t captured more interest in two years: http://eagleup.wordpress.com/warehouse/
Models need to be scaled to 1000x for EagleUP. What’s Sparkfun using that requires 100x? It would be massively helpful if models were interchangeable between scripts/software.