RabbitMQ is lightweight and easy to deploy on premises and in the cloud. It supports multiple messaging protocols. RabbitMQ can be deployed in distributed and federated configurations to meet high-scale, high-availability requirements.
RabbitMQ runs on many operating systems and cloud environments.
I noticed most people focusing on making more complex ledgers capable of executing "smart" contracts and/or crypto-magically obscuring transaction details and such. And I think those projects are pretty cool, but I'd always wanted to attempt to do the opposite and implement the simplest decentralized ledger I possibly could given lessons learned from bitcoin. I think that's what cruzbit is. Anything that I thought wasn't strictly necessary in bitcoin, or was otherwise weird, I got rid of. I wanted the design to be conceptually simple and extremely developer-friendly. I finally had some personal time on my hands so I decided, why not.
Building command line tools in Bash is an extremely tedious and somewhat enigmatic task. There's quite a bit of boilerplate code you're going to have to write if you want your script to do more than just one thing, which will only clutter your script. In addition, your scripts will likely never be able to reference good code you've written from old scripts.
Ash helps you get rid of all of your boilerplate by letting you call functions directly from the command line, while also providing a modular approach to scripting which will allow you to share code between scripts.
You are able to build a module independently that functions as a CLI or as a library (or any combination of the two), and easily share your module with the world.
It's natural to think that one can easily manage just a couple of APIs here and there, yet what starts out as just a few calls to one system or another has an intriguing characteristic of inevitably turning into a closely-coupled network of actors whose further usage or development becomes next to impossible.