HTML-Notepad - HTML WYSIWYG editor for structured documents
GNS3 - GNS3 is a graphical network simulator that allows simulation of complex networks.
Notepadqq - Notepadqq is a linux clone (identical application) of Notepad++
Cisco Packet Tracer - Download Cisco Packet Tracer, an innovative network simulation and visualization tool used by Cisco Networking Academy students and instructors.
TED Notepad - TED Notepad is a portable text editor software that deals with a large variety of text processing tools, supplemental text clipboards, high accessibility through hotkeys, and a customizable number of settings and options.
Paessler Multi Server Simulator - Paessler Multi Server Simulator is inexpensive and robust software that helps you power massive-scale testing.