Sysinternals Suite - The Sysinternals Troubleshooting Utilities have been rolled up into a single Suite of tools.
Chocolatey - The sane way to manage software on Windows.
Windows System Control Center - WSCC supports the following utility suites: - Sysinternals Suite - NirSoft Utilities
Scoop - A command-line installer for Windows
NirLauncher - Collection of more than 200 portable utilities from NirSoft
Ninite - Ninite is the easiest way to install software.