magic switch

Linksys EtherFast Cable/DSL Router with 8-Port Switch firmware.

App Switch Beep is a background application that plays the system sound.

Switch to SMB 1 on OS X 10.9 and OS X 10.10.

Hosts file manager, edit hosts files and switch between them.

Easily handle 3 sets of mouse settings and automatically switch settings

A faster way to switch between English and Russian keyboard.

Multi movie player, switch between movies like Spaces.

It lets you instantly switch playlists, skip tracks, or pause iTunes.

iPhoto Buddy can create, manage, and switch between multiple iPhoto Libraries.