Modules and Themes 
sunnysideup/migration-task
Version dev-master
Helps developers upgrade database data from one version to the next where the structure is incompati…
friendsofsilverstripe/upgrade-path
Version dev-master
Identifies which packages restrains you from upgrading to a newer framework version.
sunnysideup/upgrade_silverstripe
Version dev-master
some rough-and-ready tools to help you upgrade to the next version of Silverstripe
sunnysideup/upgrade_to_silverstripe_4
Version dev-master
Upgrade modules to silverstripe 4 and beyond