Rosetta Code is a programming chrestomathy site. The idea is to present solutions to the same task in as many different languages as possible, to demonstrate how languages are similar and different, and to aid a person with a grounding in one approach to a problem in learning another.
Surprise, surprise; Uniface was nowhere to be seen. So I've rectified that problem, and added Uniface to the list of programming languages.
I didn't have a lot of time on my hands, so I cheated and copied the contents from Wikipedia, in order to create the base page. Some of the content is out of date, as it still lists Uniface as a Compuware product, but it's a start.
The idea now is to go through and complete some of the tasks not yet implemented in Uniface, which is currently all of them! I plan to devote a little bit of time to this myself, but I guess this is a bit of a call out to Uniface developers - go forth and complete tasks!
Summary: Rosetta Code looks like an interesting site for comparing different languages, but Uniface examples are non-existent.