htop - htop - an interactive process viewer for Unix. This is htop, an interactive process viewer for Unix systems. It is a text-mode application (for console or X terminals) and requires ncurses. Latest release: htop 2.
iftop - iftop does for network usage what top(1) does for CPU usage.
Process Explorer - The top window always shows a list of the currently active processes, including the names of their owning accounts, whereas the information displayed in the bottom window depends on the mode that Process Explorer is in: if it is in handle mode you'l…
vnStat - vnStat is a console-based network traffic monitor for Linux and BSD that keeps a log of network...
nmon - This systems administrator, tuner, benchmark tool gives you a huge amount of important performance...
nload - Monitor network traffic and bandwidth usage in real time