Well, low effort, anyway. There was VX-Rexx and VisPro Rexx...
I think CA had a visual Rexx product that could create cross-platform programs (Windows/OS2) as well, but maybe I'm confusing them with Watcom. (Gah - I even had a copy of this product. Brainlock)
It's been a long time since I've even thought of visual Rexx.. I think the last time I used Rexx at all was for parsing strings on the AS/400...