Jemmy v3 is very much alive - there is quite a bit of work going on on a constant basis.
The main customer of Jemmy v3 is JemmyFX (2.* and 8), which lives in OpenJFX repository: http://hg.openjdk.java.net/openjfx/2.2/master/tests/file/tip/tools/Jemmy/ http://hg.openjdk.java.net/openjfx/8/master/tests/file/tip/tools/Jemmy/
JemmyFX 1.3 is not being developed as Java FX 1.3 is not being developed. If you have a bug in JemmyFX 1.3, please submit it on jemmy.java.net - I will see what I can do. No promises, as if the fix takes too much time, I would not be able to implement it.
Shura