Snaps are self-contained (i.e. bundling dependencies), sandboxed applications that work across different linux distros: https://arstechnica.com/information-technology/2016/06/goodbye-apt-and-yum-ubuntus-snap-apps-are-coming-to-distros-everywhere/
This is the first I've heard about them. They seem to be more popular in the area of proprietary software on linux.
