	Besides the Turtle Island Quartet, which has released fifteen albums, Summer has played with many other crossover artists. He was a member of the Jazz Chamber Trio with the pianist Alon Yavnai and the Grammy-winning clarinetist Paquito D'Rivera which played primarily Latin jazz. He has also composed pieces for solo cello, including "Kalimba" and "Julie-O", (both the solo and duo versions), the last of which has become very popular among cellists and was included in a 2015 advertising campaign for the Apple Watch. He has also arranged pieces for solo cello including "Lo, How a Rose E'er Blooming" and Jimi Hendrix's "Little Wing". He currently performs in a trio with 7 time Grammy winning jazz vocalist Tierney Sutton and is featured on 4 tracks of Ms. Sutton's Grammy nominated recording, "AfterBlue".