I had to get the password for IIS application pool account in SharePoint to take the control over on an existing SharePoint 2013 environment. Here are the list of tools helped me to get app pool password:
1. IIS Metabase Explorer (for IIS 6) – Part of IIS Resource kit – Make sure “Secure Data” is checked.
Get it from here. https://www.microsoft.com/download/en/details.aspx?displaylang=en&id=17275
2. SharePoint Manager – Excellent tool for exploring the server objects. Just navigate to the target application pool, get the password from the properties pane.
Get the SPM from codeplex: SharePoint Manager
3. Using APPCMD command line tool to get App Pool Password:
Appcmd is a command-line tool for managing IIS 7 and above. You can find it under “C:\Windows\System32\inetsrv”, To retrieve the IIS Application Pool’s password enter this command:
appcmd list apppool “<Your Application Pool Name>” /text:ProcessModel.Password
4. PowerShell to retrieve App Pool Passwords:
Get-WmiObject -Namespace "root\MicrosoftIISV2" -Class "IIsApplicationPoolSetting" | Select WAMUserName, WAMUserPass