It’s much less active than it used to be, but there is a DIY Soylent community. There’s a pretty good site at:

https://www.completefoods.co/

that ranks the most popular recipes and has a pretty decent app that calculates nutritional value and per meal cost of the various recipes.

edit - looking at it now, I’m not sure if the price calculations per recipe are up-to-date. In particular, I know the cost of protein powder has increased substantially, so your mileage may vary in terms of the listed costs, but the calculator is still very useful for concocting your own recipes and forking/modifying other people’s recipes.

There’s a project called No Longer Evil that will make bricked Nest thermostats usable again:

https://nolongerevil.com/