You probably know the Kokua Viewer is the replacement for the Imprudence viewer. There are alpha or experimental versions of the viewer that you can use on Second Life and OpenSim grids.

Kokua/Imprudence Viewers
You probably don’t know they are up to version 3.3.4.23807, which is based on the Second Life™ viewer code version 3.3.4 Release 3.
The Kokua blog is: Kokua/Imprudence Blog, not very original, but very practical.
The Kokua Viewer Download… looking for a link? There really isn’t one. There is no official release of the Kokua viewer. There is however an experimental version you can use… for testing of course. Today’s current Kokua Viewer download is here. This will change as time passes. The link should remain live over time as it is into a wiki release notes page.