intuitive network emulator that interacts with real nets (GUI)

core-network-gui

intuitive network emulator that interacts with real nets (GUI)

The Common Open Research Emulator (CORE) is a tool for emulating networks in one or more machines. You can connect these emulated networks to live networks.
Full-screen character mode text editor

the

Full-screen character mode text editor

THE (The Hessling Editor) is a text editor that uses both command line commands and key bindings to operate. It is intended to be similar to the VM/CMS System Product Editor, XEDIT and to KEDIT from Mansfield Software.
typewrite like sans-serif font

fonts-jura

typewrite like sans-serif font

This font remembers of a typewrite font without the serifs. The latin letters assume pretty much of a "Swiss" feel, so the font was named after the Jura region on the border between France and Switzerland.
Chinese lunar calendar

chinese-calendar

Chinese lunar calendar

Ettercap GUI-enabled executable

ettercap-graphical

Ettercap GUI-enabled executable

Ettercap supports active and passive dissection of many protocols (even encrypted ones) and includes many feature for network and host analysis.
GNU time program for measuring CPU resource usage

time

GNU time program for measuring CPU resource usage

The 'time' command runs another program, then displays information about the resources used by that program, collected by the system while the program was running. You can select which information is reported and the format in which it is shown, or have 'time' save the information in a file instead of display it on the screen.