RezMela is an opensim application currently hosted on Kitely. 

Go to the Kitely Welcome Center world page.
Click Enter World and follow the instructions.
How to Create Your Own World

Click New World.
Enter the world details, and click Create.
Click on the name of the world.
Click Enter World.
Login Details

(This information is intended for experienced users only. If you are new to virtual worlds then the easiest way to login is by going to a world page and clicking Enter World.)

Get a viewer that is compatible with Kitely. We recommend Firestorm or Singularity.
Login URI:http://osgrid.kitely.com:8002
Username: your_user_name
Password: your_password
(For security reasons, your viewer password is different from your website password.)

How to connect to kitely worlds using viewers
http://www.kitely.com/startviewers

Kitely works best with the Firestorm viewer. If you have Firestorm installed but are having problems connecting then you may be running a version of Firestorm that only works with Second Life. To access Kitely with Firestorm:

Download the OpenSim-compatible version of Firestorm and install it in the default installation directory. 
Go to the Settings page and refresh the browser.
In the Virtual World Viewer section, select to use Firestorm.
You can now go to any world page and press the Enter World button.

If the plugin solution does not work, then try manual entry on kitely grid
While logged into your account, go to
and click at the last link on the page
that says show viewer login details
note your login name and password

2. Launch the firestorm viewer directly
enter the login and password directly,
and the select kitely on the drop down menu under the 'Log into Grid' item menu.

Download compatible viewer
If you're using Mac OS X or Windows then please:
1) Download the plugin from here: http://www.kitely.com/file?type=plugin
2) Download the viewer from here: http://www.kitely.com/file?type=viewer (make sure to install it in the default installation directory so the plugin will be able to find it)
http://www.kitely.com/faq?id=how-do-I-configure-my-firewall-to-allow-access-to-kitely