Input Director

Input Director is a free program that enables two or more computers connected on a network to share a single mouse and keyboard input, allowing for dragging a mouse pointer across multiple screens. This easy to set-up software also enables the sharing of clipboard contents, including copying/pasting files and folders across multiple computers.

Read the article HERE.

You might want to check out Synergy2 as a compare-and-contrast. It doesn’t do the copy/paste files and folders or have some of the features listed in Input Director, but it’s rock-solid on reliability. The nice thing about synergy is that it’s platform-independent. You can share the keyboard, mouse, and clipboard on a Windows machine with that of a Linux or Mac, and you can add as many machines to the config as you like.

PixelCryptor Encrypts Files

File encryption utility PixelCryptor doesn't use a textual password to encrypt your files, it uses a digital image. Lock up your PixelCryptor file package like a drum and set an image as the key. The more complex the image, the more secure your encrypted folder. Then, on another PC with PixelCryptor installed (or available on a thumb drive), unlock the folder contents only with the image you used to encrypt it.

Read more HERE.