What is the best Emacs workspaces plugin?

Question

By workspace, I mean - I need to save the state of my open buffers (possibly in a user specified workspace file) and quickly switch to another set of open buffers, e.g. to conti

Answer 1

desktop.el will be helpful in your situation.

It can (copied from its introduction page) from the emacs packages buffer:

Save the Desktop, i.e., - some global variables - the list of buffers with associated files. For each buffer also - the major mode - the default directory - the point - the mark & mark-active - buffer-read-only - some local variables