Portable Portable is an advanced raw image processor with a wide range of powerful features for processing the raw photos from your digital camera. Demosaicing, advanced color handling, exposure and tonality tools, denoising methods, and more are right at hand in the configurable interface. And it's packaged as a portable app so you use it on the go. It's packaged in PortableApps.com Format so it can easily integrate with the PortableApps.com Platform. And it's open source and completely free.

RawTherapee Portable is packaged in a PortableApps.com Installer so it will automatically detect an existing PortableApps.com installation when your drive is plugged in. It supports upgrades by installing right over an existing copy, preserving all settings. And it's in PortableApps.com Format, so it automatically works with the PortableApps.com Platform including the Menu and Backup Utility.

Features
- High Image Quality
* Get the most details and least artifacts from your raw photos and photos in other formats thanks to modern and traditional demosaicing algorithms: AMaZE, DCB, fast, AHD, EAHD, HPHD & VNG4.
* Advanced color handling from white balance to HSV (Hue-Saturation-Value) curves and color management.
* Enhanced exposure and tonality tools: tone and Lab curves, highlights and shadows tools, etc.
* Multiple denoising methods: luminance, chrominance, impulse (for salt and pepper noise) noise reduction.
* Several tools to enhance details: unsharp mask, RL deconvolution, contrast by detail levels.
- Efficiency
* Multi-threaded algorithms for high performance (RawTherapee can utilize modern processor features).
* Quick thumbnails load lightning fast and are replaced later with live thumbnails
* Batch processing: convert all the developed images at once without not loading the processor while you work.
* Basic tools immediately at your hands.
* Parallel editing of multiple images.
* An optional secondary display can be used.
- Versatility
* Wide variety of supported cameras: almost all DSLRs and even some medium format bodies are supported.
* Advanced control over the algorithms with many fine-tuning parameters.
* Command line usage besides the normal graphical interface.
* Various layouts: multiple tabs, single tab with filmstrip, vertical tab with filmstrip.
- Freedom for Free
* RawTherapee is free and open source software, meaning you can use it free of charge, wherever you like on whatever hardware you like, as long as you abide by the copyleft GPLv3 license. Download the source code, modify it, feel free to do what comes to mind. We believe in open software.
* RT is cross-platform: Linux, Mac, or Windows, be it 32-bit or 64-bit - you pick, we provide.
* International: it is available in 25 languages!

2012. June 27. (Wednesday) RawTherapee 4.0.9.50 released
New Features
- Support for Adobe LCP lens correction profiles
- Program plugger for Windows, to automatically find and be able to
open right-clicked photos with popular photography programs.
- Support of Dual illuminant DCP profiles
- Support for new cameras in addition to those already supported by dcraw:
- Nikon D800
- Canon EOS 5D Mark III
- New camera DCP profiles:
- Nikon D5100
- Nikon D7000
Most commits focused on squashing bugs and speeding up processing.

Caveats
Default raw and non-raw processing profiles have changed. If you have used any version of RawTherapee older than 4.0.9, you must go to Preferences > Image Processing and select new default image processing parameters. It is recommended that you use "Default" for raw files and "Neutral" for image files.
Risk of PP3 data loss - beware when running multiple RT versions
RawTherapee cleans up obsolete or invalid tags from active PP3 files. The tag cleanup process is run in three situations:
* When you affect the PP3 file in any way, e.g. by tagging a photo,
* When you select another folder in the File Browser tab,
* When you exit RawTherapee (equivalent to leaving the open album).
This means that a more recent version of RawTherapee will delete obsolete tags which may have been used by an older version, and vice versa - if you use an old version of RawTherapee to browse photos edited with a newer version, it will delete the tags introduced in the new version. This issue is being worked on and future versions of RawTherapee will support XMP sidecar files with concurrent embedded profile versions.