view detailed information about open connections

 Sockstat is a tool to let you view information about open connections.
 It is similar to the tool of the same name that is included in FreeBSD,
 trying to faithfully reproduce as much functionality as is possible.
 .
 This version of sockstat contains several additional features, like
 the ability to look up sockets in use by GID, UID and process name,
 as well as the other criteria supported by FreeBSD's sockstat.