If you have ever used custom content types (ie you made and used new ones), or you use a language other than the English one, please wait with upgrading to 1.0.0-alpha4 - an alpha5 will be released within 2 days to fix some issues that arose in the alpha4 release that affect those specific cases.
It utilizes a plugin to store resource data to a seperate table whenever a resource has been edited, and allows you to view specific details, compare revisions and restore a revision.
Simply install the package through package manager. Please report any bugs or things you feel should be different to Github: https://github.com/Mark-H/VersionX/issues
New in VersionX 1.0.0-alpha4
Numbers at the start of the line refer to issues on Github.