Nucleus

Nucleus allows you to share and access files across computers connected throughout your home with ease. Nucleus requires no network configuration, all computers with Nucleus installed on them are automatically detected in seconds. You have full control over what folders are shared and how they are shared (read-only or read and write) on a per user basis. Thumbnails are presented for files that support them, such as images, videos, PDF files, word documents, etc. Nucleus is designed to work on your local network so you do not need an active internet connection to use it, and because files never leave your network you get better speed and security.

Requirements:

.NET Framework 3.5 SP1