DiffMerge

DiffMerge is a graphical file comparison program for Windows, Mac OS X and Unix, published by SourceGear.
* Integrates with Windows Explorer; adds a shortcut to the context menu.
* Compatible with different character encodings, including Unicode support.
* Performs a side-by-side comparison of two folders.
* Supports comparison of three files.

It's free!



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(On DiffMerge website there are a lot of usefull others tool, take a look!)

Cordova

Apache Cordova is a free and multiplatform set of device APIs that allow a mobile app developer to access native device function such as the camera or accelerometer from JavaScript. Is possible combine a UI framework like jQuery Mobile or Dojo Mobile or Sencha Touch, in this way is possible  for a smartphone app to be developed with just HTML, CSS, and JavaScript.









With Cordova is possible write a single project and build for many devices like:

• Amazon Fire OS
• Android
• Bada
• Blackberry
• FirefoxOS
• iOS
• Mac OS X
• Qt
• Tizen
• Ubuntu
• WebOS
• Windows (desktop)
• Windows Phone 7
• Windows Phone 8

There are a lot of plugins (now there are 679) to improve app development 

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AirDroid

AirDroid is a freeware application like AirDrop for Mac and iPhone.

This app is able to let comunicate PCs, only windows or mac, not linux :( , with your android smartphone.

With AirDroid you can transfer files among andorid smartphone and pc, can answare your calls with your pc, and many other features.

It's Free.

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