If there is no issue, it can be solved using blockchain.

Any of the Explorable Explanations that Bret Victor creates. Later followed up by more from Nicky Case, and more

All the links I clicked led to other websites. Is it an aggregator?

What you saw probably was the collection created by Nicky Case. Check his own explanations though https://ncase.me/ and then also check http://worrydream.com/#!/ExplorableExplanations (and other explanations by Bret Victor)

It was Al Gore

They used to be, they filled an unmet need in the design tools space (clickable prototypes) for years. Lately tools for interface design (Figma, Framer X, Quartz Composer, Origami, etc) have Invision’s main feature baked into their software (where the work is being created) so there‘s less need for designers to use it. Invision intended to get into the creation tools market, but suffered a poorly-managed rollout of their application, and has been floundering since.

They also had a fairly drastic price increase that made our company scale licenses back to only designers, which has reduced the collaborative aspect it once had.

This reminds me of Bret Victor’s Bookcase which displays the sections “highlighted” by projecting them on a wall and navigating to that page on an iPad.

I use spaced repetition with this https://apps.ankiweb.net/