Psi is a free instant messaging application designed for the XMPP network (including Google Talk). Fast and lightweight, Psi is fully open-source and compatible with Windows, Linux, and Mac OS X. To connect to Openfire you need to download “PSI” client software and install on your system.
Step 1 - Download PSI chat client from Internet.
Step 2 - Install PSI client from downloaded folder.
Step 4 - Agree the license agreement, Click I Agree
Step 6 - Choose the installation location, Click Install
Step 7 - Installation completed, we can run the program now. Click Finish
Step 8 - Open PSI, select profile as "Default" then click Open.
Here we can Create/Register a User Account.