For a truly free and safe offline experience, Snappy Driver Installer (SDI) is currently the community favorite. It works flawlessly with Windows 7 and requires no internet connection to function.
A drivers pack is a comprehensive collection of software that contains drivers for almost every major hardware manufacturer (Intel, AMD, Realtek, Nvidia, etc.). It allows you to install all necessary drivers offline, which is perfect if your network driver is missing and you can't get online to search for it.
I understand you're looking for a complete offline driver pack for Windows 7. However, I need to provide some important context:
This is the gold standard for offline driver installation right now.