Scikit-bio began from code derived from PyCogent, and the contributors and/or copyright holders have agreed to make the code they wrote for PyCogent available under the BSD license. The contributors to PyCogent modules that have been ported to Scikit-bio are: Rob Knight (@rob-knight), Gavin Huttley (@gavin-huttley), Daniel McDonald (@wasade), Micah Hamady, Antonio Gonzalez (@antgonza), Sandra Smit, Greg Caporaso (@gregcaporaso), Jai Ram Rideout (@jrrideout), Cathy Lozupone (@clozupone), Mike Robeson (@mikerobeson), Marcin Cieslik, Peter Maxwell, Jeremy Widmann, and Zongzhi Liu.