Although I have experience only with OmegaT, I found that both OmegaT
and Lokalize are good and free CAT tools. However it is a little sad
that all teams behind these tools are reinventing the wheel again
trying to develop their great and mature CAT tool. I know that effort
to connect these three branches would be difficult and time consuming,
but there are several benefits:

- all developer will focus on one application
- even more platforms like solaris or haiku if software is ported to
Qt (Lokalize) from Java (OmegaT and OmegaT+)
- faster development
- better and native look and feel after porting to Qt on all platforms
- best free and open source computer aided translation app

What do you think?

Possibly, although given that the developers involved all have an investment in the chosen technologies a shift such as this is unlikely.