We’ve released Wt and JWt 3.3.9. The Wt 3.3.9 release mostly adds features that were previously only available in Wt 4, like the Microsoft SQL Server backend for Wt::Dbo. The JWt release merely consists of bug fixes.
Here are the links for 3.3.9:
Wt (C++): download wt-3.3.9.tar.gz (release notes)
JWt (Java): download jwt-3.3.9.zip (release notes)
Binary builds for Windows are availble on the GitHub releases page.