List of recently changed files for a directory and all subdirectories
PowerShell 2.0
Latest 10 changed files
Dir C:\folder -r | ? {! $_.PSIsContainer} | sort LastWriteTime | select -last 10
Changed files since given date
Dir C:\folder -r | ? {! $_.PSIsContainer -AND $_.lastwritetime -ge '04/18/14'}
Read more on http://ss64.com/ps/