Third Party Viewer Directory/Libretto
From Second Life Wiki
The Libretto Viewer is a light weight, text only viewer for Second Life. It's designed to resemble and function as an instant messaging client, that can be used in an office environment, on low performance/bandwidth computers, or when multiple instances are needed
Disclaimer: Linden Lab makes no representations or warranties regarding any of the listed viewers or developers. These third-party viewers are not affiliated with or overseen by Linden Lab. Please take reasonable precautions, including virus scanning, before installing and using any of the listed viewers.