Oracle/Stellent Migration to SharePoint 2010/2013

I'm looking for a SharePoint SME who has done migrations/upgrades from Oracle or Stellent platform to SharePoint.  I'm trying to find out if it's possible to migrate content from Oracle WCI and Stellent UCM to SharePoint 2010/2013 without the use of migration tools.  I've discovered that Metalogix and AvePoint both have solutions that address that particular need but is there another method this can be done without the use of tools.

Thanks for your help,

Best Regards, Charnise Cooley