Docker

[NoozAbooz]

Docker.zip

[Botspot]

I will have to decide if this is eligible.
Pi-Apps is mainly for graphical apps which do cool stuff out-of-the-box, while Docker is not graphical and requires you to do configure stuff for it to do anything.
Like an empty sandbox (docker), instead of a toy (app).

[Botspot]

OK I've decided not to add this. While it may be open-source, docker works fine installed from APT, and is intended for the professional developer who knows what he is doing.
Pi-Apps on the other hand, is intended for standalone useful tools that do stuff out-of-the-box, for beginners.

Docker does technically fit the criteria, but in this case I don't think it's a good fit for Pi-Apps.