Social Source Commons

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Aviary is a suite of free image markup tools, such as an effects editor, screen capture and editor and others. Aviary also offers a Firefox extension for online screen capture.

Clonezilla, based on DRBL, Partclone and udpcast, allows you to do bare metal backup and recovery. Two types of Clonezilla are available, Clonezilla live and Clonezilla SE (server edition). Clonezilla live is suitable for single machine backup and restore. While Clonezilla SE is for massive deployment, it can clone many (40 plus!) computers simultaneously.

Image browser, converter, and editor.

Rich graphical image editor

Hugin is an easy to use cross-platform panoramic imaging tool. You can assemble a mosaic of photographs into an immersive panorama image, stitch any series of overlapping pictures and much more.

Primarily known as command line image manipulation tools for Linux, Image Magick includes a gui program called "display."

Image editing software

Transform PDF files into images

Support for editing, managing, enhancing, and sharing photos. Includes tools for photo corrections, retouching, and color correction. Common editing tasks can be recorded and used on multiple photos. Also includes set of drawing and painting tools.

A online, free, no registration requirement, photo editing tool.

Image editor for Mac OS X

The Rasterbator creates huge, rasterized images from any picture. Upload an image, print the resulting multi-page pdf file and assemble the pages into extremely cool looking poster up to 20 meters in size.

Search flickr images by uploading a similar image or sketching the desired image.

Extensoft's Screen Capturer is a tool for recording screen activity including images and video into a variety of image and video formats.

Seashore is an open source image editor for Cocoa. It features gradients, textures and anti-aliasing for both text and brush strokes. It supports multiple layers and alpha channel editing. It is based around the GIMP's technology and uses the same native file format.

Screenshot and photo editing software for OS X.

Hosted image editor that supports multiple layers, has photo managing features and allows you to work with shared photos from sites like Flickr and Facebook.

A free, hosted image editor with features similar to Photoshop. Interaction feels like a desktop application.

The Noun Project collects, organizes and adds to the highly recognizable symbols that form the world's visual language, providing them for use for free.

Image galleries, portfolios, and project pages you can embed on your own web site.

Open source software suite for reading bar codes from various sources, such as video streams, image files and raw intensity sensors. It supports many popular symbologies (types of bar codes) including EAN-13/UPC-A, UPC-E, EAN-8, Code 128, Code 39, Interleaved 2 of 5 and QR Code.