An easy-to-use tool for photographers who want to give digital images an analog look. Includes a wide range of presets for quick adjustments and manual tools for precise user-controlled editing. Can be installed as a Photoshop plug-in or as a standalone application.

Please note: Use of the software requires a two-stage registration during installation, available until March 31, 2016.

A semi-professional, open source image processing software suite that includes layer support and a wide range of correction tools and filters. A user guide is available here.

The portable version of the semi-professional, open source GIMP image processing software suite that includes layer support and a wide range of correction tools and filters. Runs directly from USB or other memory media and requires no additional installation. A user guide is available here and you can download the source code here.

A plug-in for GIMP that contains a large number of predefined image filters and effects. The source code is available for download here.

Please note: The contents of the archive have to be copied to the GIMP plug-ins folder, which can usually be found under C:\Programs\GIMP-2.x\lib\gimp\2.0\plug-ins\. The G'MIC entry will be listed in the GIMP Filter menu when you restart the program.

A comprehensive suite of tools for stitching horizontal and vertical panoramas. Automatically generates control points that can be manually adjusted by the user. The source code is available for download here. Requires .NET Framework 3.5 or later.

An open source vector graphics editor with capabilities similar to Illustrator, CorelDraw, or Xara X. Uses the W3C standard scalable Vector Graphics (SVG) file format. Inkscape supports many advanced SVG features (markers, clones, alpha blending, etc.) and makes it easy to edit nodes, perform complex path operations, trace bitmaps and much more. The source code is available for download here.

Portable version of the Inkscape open source vector graphics editor. The source code is available for download here.

A RAW converter that supports virtually all known RAW formats and includes tools for making significant improvements to overall image quality. Includes advanced white balance, exposure compensation, camera profiling, saturation, brightness and contrast algorithms.

A freeware RAW converter/editor that supports all current DSLR camera models. The source code is available for download here.

Removes scratches, dust particles and other blemishes and restores photos and scans in just a few clicks.
c't Digital Photography readers click here for a 50% discount on an upgrade to the latest full version. Offer valid until March 31, 2016.

A plug-in for GIMP for individual or batch conversion of various RAW format image files. You can download the source code here.