As above: do please contact me if you hit problems with, or have questions about, any of these apps. I don't promise that I will be able to help and it may take me a week to reply but if you haven't heard in a week, try that form again.
There is now an Email announcement list, never updating more than monthly, where I will put up developments of new apps here but also a summary of updates to the online glossary and new posts in the Rblog. You can sign up for the update list here to be alerted to new things.
Last updated 21.v.25