Adobe Photoshop Lightroom is a photography software program developed by Adobe Systems for Mac OS X and Microsoft Windows, designed to assist Adobe Photoshop users in managing large quantities of digital images and doing post production work. It is not a file browser like Adobe Bridge, but rather an image management application database which helps in viewing, editing, and managing digital photos, the same way photographers used to do in the non-digital world

Click here to download the free trial version of Adobe Lightroom 4

Features

Unlike traditional image editing software, Photoshop Lightroom is focused on the following workflow steps:

• Library – image collection review and organization - similar in concept to the 'Organizer' in Adobe Photoshop Elements
• Develop – non-destructive RAW and JPEG file editing
• Slideshow – tools and export features
• Print – layout options and preferences
• Web – automatic gallery creation and upload
• Tethered Capture Support for many popular Nikon and Canon DSLRs^[6]

The Develop module has a number of standard presets for colour correction or effects and supports the sharing of custom presets online. Another often used feature in the Develop module is the ability to synchronize the edits from one particular photo to the whole selection.

• Lightroom Forums Lightroom dedicated forum
• http://www.adobe.com/products/photoshop-lightroom.html

Text source: Wikipedia.org