PuTTY - Popular free terminal application. Mostly used as an SSH client.
Unimus - Unimus is a Network Automation and Configuration management (NCM) solution designed for fast deployment network-wide and ease of use. Unimus does not require learning any abstraction or templating languages, and does not require any coding skills.
Tera Term - Tera Term (Pro) is a free software terminal emulator (communication program) for MS-Windows.
Oxidized - configuration backup software (IOS, JunOS) - silly attempt at rancid
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
RANCID - RANCID - Really Awesome New Cisco confIg Differ.