iftop does for network usage what top(1) does for CPU usage. It listens to network traffic on a named interface and displays a table of current bandwidth usage by pairs of hosts. Handy for answering the question "Why is my Internet link so slow?".

The GNOME Session Manager is in charge of starting the core components of the GNOME desktop, and applications that should be launched at login time. It also features a way to save and restore currently running applications.

FreeIPA is an integrated solution to provide centrally managed Identity (machine, user, virtual machines, groups, authentication credentials), Policy (configuration settings, access control information) and Audit (events, logs, analysis thereof).

This is the GNU C compiler, a fairly portable optimizing compiler which supports multiple languages. This package includes support for C.

Slic3r converts digital 3D models into printing instructions (G-code) for your 3D printer. It cuts the model into horizontal slices (layers), generates toolpaths to fill them and calculates the amount of material to be extruded.