You probably know that Project SANSAR aka SL 2.0, is going to use a proprietary viewer. If we were really lucky, there would be no viewer. The new world would be web ready. But, I get the impression that is out. More and more I think it will be via app only.
In any event an open source viewer for SANSAR is not currently in the cards, at least for the initial release and probably for sometime after the main release.
A thing about an open source SANSAR viewer came up in this last TPV Dev meeting. Jessica brought up the lack of motivation for a number of programmers working on the Linux viewers, since SANSAR will be closed source.
Oz commented in the TPV meeting saying that from what he has seen, they, the SANSAR team, would not be able to do the things with SANSAR that they are doing, if they relied on open source components.
This means it is very unlikely we will see an open source or third party viewer for SANSAR any time soon.
The Lab has taken the proprietary components they use in the current Second Life viewer and made them into libraries that third parties can use. Which is why we have an open source viewer in SL. That may eventually happen with SANSAR. The door is not permanently shut. But, for now it is.
I can see where that would kill off some motivation.