Export Certificates using Powershell

dir cert:\LocalMachine\My | Where-Object { $_.hasPrivateKey } | Foreach-Object { [system.IO.file]::WriteAllBytes("$home\$($_.SubjectName).pfx", ($_.Export('PFX', '')) ) }

Free partition magic tool

http://gparted.sourceforge.net/

Convert amr file to mp3

Some android applications may save audio files in amr format. To convert amr file to mp3 file you can use this tool