What tools to work with pkgs installed thru snap system

[hput]

After googling a bit I still haven't found out if there are tools
similar to the powerfull tools available in apt/aptitude/apt-get
systems.

Or other powerful tools such as dpkg for such things as
  dpkg -L pkgname ... to list out the files installed

I found a wikipedia article about snap .. but still did not learn the
mechanics.

Some pointers to URLs on the subject... particularly URLS that are
ubuntu specific ... snap system related, would be most welcome.