(There's no video for SuperCard 1.x yet. Please contribute to MR and add a video now!)
SuperCard is a HyperCard-like software development kit, with more features. For instance, it came already with color (HyperCard did not) and it had a full GUI toolkit. SuperCard has another major improvement over HyperCard: it can make applications out of its card stacks so that they become standalone and thus can be run without SuperCard on other computers.
SuperCard uses its own scripting (programming) language called SuperTalk, somewhat similar to what HyperCard was using (HyperTalk).
SuperCard_1.6.1.sit (1.97 MiB / 2.07 MB)
SuperCard v1.6.1 / compressed w/ Stuffit
SuperCard1.5.sit (2.84 MiB / 2.98 MB)
SuperCard v1.5 / compressed w/ Stuffit
System 6 - Mac OS 9.2.2
At least 500KB of free RAM
Emulating this? It should run fine under: Basilisk II