California Citizens Redistricting Commission Ballotpedia
https://youtu.be/yBsnlhDMdUY?t=5286
The “Iowa Model” for Redistricting4/6/2018
Nonpartisan Staff Draw Maps in Iowa–Legislature Votes on Them
https://www.ncsl.org/research/redistricting/the-iowa-model-for-redistricting.aspx
Initiative and Referendum Institute–26 states
States with some form of initiative and referendum:
http://www.iandrinstitute.org/states.cfm
Michigan Independent Citizens Redistricting Commission in State Constitution
Here is the actual language of the Constitutional Amendment Michigan voters passed with 61% yes votes in 2018 as Proposal 2.
https://www.legislature.mi.gov/(S(strlziv4od4uj34sbzoh2uk0))/mileg.aspx?page=GetObject&objectname=mcl-Article-IV-6
Green Grassroots Emergency Election Protection Coalition 