Description:

xsm application is a session manager. A session is a group of
applications, each of which has a particular state. xsm allows you to
create arbitrary sessions - for example, you might have a "light"
session, a "development" session, or an "xterminal" session. Each
session can have its own set of applications. Within a session, you
can perform a "checkpoint" to save application state, or a "shutdown"
to save state and exit the session. When you log back in to the
system, you can load a specific session, and you can delete sessions
you no longer want to keep.