- twitter.com matthewmcmillanmatthewcmcmillan.blogspot.com. Joined June 2009.
- twitter.com MattsPrintrbotmatthewcmcmillan.blogspot.com. Joined July 2015.
- twitter.com MatrixPrecisionMatrix Precision AI specializes in the creation of 3D printing peripherals and hardware, fueled by the 3D printing community's members and interests.