A pre shareholder agreement is recommended for those entrepreneurs that are in -2 and -1 stages, in the middle of the process to build a team in which you have no shareholder agreement and you are looking for initial commitment from your potential team members.
Link to original source: http://www.startupcommons.org/pre-shareholder-agreement.html

Startup Development Phases is free to share communication tool to help understand startup journey, identify key stages and to help develop Startup from "idea to business" and from "founding team to organization" in balanced and understandable manner.
Link to original source: http://www.startupcommons.org/startup-development-phases.html