Find all files modified after a date

To find all files modified after may 1st, 2014 :

Get-ChildItem .\ -recurse | Where-Object { ($_.PsIsContainer -eq $false) -and ($_.LastWriteTime -gt (get-date '2014-05-01')) } | select fullname,lastwritetime,length | Out-GridView

Find all files and folders with specific name

To find all files and folders with ‘excel’ within their name :

Get-ChildItem -filter "*excel*" -Recurse | select name, fullname, lastwritetime,PSIsContainer | Out-GridView