Allow SharePoint users to reset their forgotten password without requiring IT Administrator's intervention using Password Reset. Active Directory Services, NT Directory Services and SQL Membership support; Accounts can be black-listed to prevent their passwords from being reset; Accounts can be blacklisted to prevent
Active Directory Password Change in SharePoint is a Visual Studio 2010 solution that includes 1 feature to add link to welcome menu and save application page
How to change active directory User Account Password How to change active directory password HTML code in Sharepoint 2010 to pull from active directory.
This code sample to change entries in Active Directory.