I'm not really clear on what Anjuna does, but it doesn't seem to square up with the capsule summary on this page, since it's based on SGX (actually it seems like a HAL adapter over a bunch of different enclave technologies?) --- which would make it hard to adapt to normal applications, and also not necessarily immune to vulnerabilities like Meltdown and Spectre.

Edwin.ai - the largest ESL market in the world is China, where Facebook is banned, yet you require Facebook to log in? Oops!

Repl.it looks awesome.

So often the biggest obstacle to trying out a new language is the activation energy of setting up the corresponding coding environment. Sometimes you just think, "eh, probably don't really need to try it". This is especially true when your computer gets low on storage.

What's repl doing that hasn't been done for years by dozens of companies, besides better marketing? E.g. https://www.hongkiat.com/blog/cloud-ide-developers/ or https://www.slant.co/topics/713/~best-cloud-ides