Every web application and authentication system that stores password encrypt the clear-text password into an encrypted ciphertext. The encryption is one-way, and cannot be reversed. If you forgot your password, you'll have to reset it as the original password cannot be recovered.
If you're a developer and know your encryption algorithm, you may use this tool to generate a cipher-text password that you can assign in your database.
What are the hashing algorithms used by popular CMSes?