Full-featured, easy-to-use Notes client application framework
What versions of the Notes client and Domino server are supported by SuperNTF? Will it run in a 6.5 environment?
but not earlier versions. That said, I haven't hit it with 6.5 in a while so YMMV. The current 0.9.7d version is likely the last one designed with the intention to fully support 6.5.