Sometimes, even in today's hyper-connected world, you can still find yourself without a mouse. Maybe someone's borrowed it, or the batteries have died. Either way, you're stuck. Here are three apps for iPhone and Android that can help, along with steps for implementing them.
Mobile Mouse Pro (iPhone/iPad, $1.99)
Mobile Mouse Pro works for Mac and PC, becoming a remote trackpad and mouse, a remote control for your apps, and a presentation controller. Works over wifi and requires a server to be running on your computer.
How to use it: Grab the software from their site, install and run the server, configure settings, and use the app.
Gmote "turns your Android phone into a remote control for the computer". It lets you control music and movies with standard remote control features, has a built-in file browser, as well as touchpad and keyboard functions.
How to use it: Grab the server software, set up a password, and set up your media paths. Simple as that. Gmote can run over both 3G and WiFI.
TouchPad (iPhone/iPad, $4.99)
Touchpad becomes a remote control, extended keyboard, multitouch trackpad and remote. It runs through the Mac OS X built-in Screen Sharing, so requires no additional software for the computer.
How to use it: Enable Screen Sharing in your System Preferences, run the app, and follow the prompts. Online support is available at their site.