XML Save/Load bug fix...
Recent changes in Java security policy might prevent you from running VARNA.
Check out this page for details and ways to solve the problem.
An applet that demonstrates some of the features of the VARNA RNA 2D Panel
Try to drag an helix (ladder) around ;)
Disclaimer: Please remember that this quick and dirty demo is not a production tool.
Consider using the JAVA web start version as an alternative for more serious applications.
Note to Firefox users: Certain versions of Firefox may be confused by self-signed certificates, and silently prevent the applet from running. If the frame above shows up empty, then try reloading the page.