Java Server Add-in for Domino

Whenever I go looking for this stuff I can never remember where I found it. So, if I keep a link here I'll never have to scratch my head again. nsftools has a great selection of java tips including Java Server Addins for Domino. We are using these in production in conjuction with Servlets. I had to find the link again for another developer to create another addin.
Thanks Julian!