No specific info about version 1.6. Please visit the main page of Tunnelupdate on Mac Informer.
Adobe Flash Player Debugger can be very useful for collecting debug information.
SyphonInject allows you to syphonize an application at runtime.
Graphic user interface wrapper for the Mercurial version control system.
Subversion client for the Mac. A helpful tool: Versions provides a pleasant way to work with Subversion on your Mac.
Create an installer with the plugins you want, in only the formats you need.