Linden Lab Official:Alternate Viewers
From Second Life Wiki
What is an alternate viewer?
The primary viewer for Second Life is the official Second Life Viewer, available on the main Second Life Downloads page. That page also links to the latest beta, the version next in line to become the next released Viewer.
The viewers below provide alternate means of accessing Second Life.
|Note: If you experience problems using any of the viewers below, you may be asked to try to replicate the problem using the officially supported SL Viewer release.|
Second Life Project Viewers
A Second Life Project Viewer is an early release from a Viewer development team that provides a preview of one or more new features. See the linked project pages for the status of the feature and instructions on how to provide feedback based on your use of the feature.
|Note: Use of the Pathfinding feature may currently be restricted to specific regions and may not be accessible via most regions. More information will be here soon!|
Second Life Development Viewer
The Second Life Development Viewer is the very latest build of features and fixes that are on the way to being in the next Beta release. Every build of the main development tree is made available for you to try as soon as it's built. The Snowstorm Project page has information on the process of creating these builds and how you can contribute to them as either a developer or a tester.
Many Second Life developers, outside of Linden Lab, offer customized Second Life viewers. Please note that Linden Lab does not support third-party viewers.
Detailed information about many viewers in the Third Party Viewer Directory may be found in the Resident-maintained Downloads article.