RawTherapee Portable 4.0.11.1 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!

2013. May 29. RawTherapee 4.0.11 is out!
4.0.11 includes a number of new features which you can read about below, but just as importantly it contains a large number of speed improvements and bug fixes, so we recommend you update straight away! Builds should be ready within a day or two. Once they are, get them from the Downloads section or using your operating system's package manager.
Read below to find out more about what's new.

New features
- CIECAM02 "Adaptation scene luminosity" now calculated automatically
* CIECAM02 hot/bad pixel fixer to prevent bright pixels from appearing
* The Defringe tool is now able to target a range of specific colors without touching others
* New bundled processing profiles
* New keyboard shortcuts to apply rank and color labels and a new direct popup menu for color labels, all in the File Browser
"Profile Fill Mode" button controls whether to replace missing processing profile values with default ones or not
* Keyboard shortcuts to open the next/previous image and to synchronize the File Browser strip with the currently opened image
* New demosaicing algorithms for noisy photos: LMMSE, IGV
* More zoom levels
* Redesigned save window
* New functionality of the minima/maxima control points curves editor, see the RawTherapee Manual
* Support for TIFFfiles with alpha channels
* Support for 32-bit TIFF files (HDR)
* Preferences/Batch processing options: all to 'Add' and all to 'Set'
* Support for: Nikon D5200, Nikon D7100, Nikon COOLPIX A, Panasonic Lumix DMC-G5
+ Many significant speed improvements and bug fixes.

Refer to the RawTherapee Manual for information about these tools and how to use them.

Caveats
* Memory requirements
* Please read the blog entry on maximizing memory efficiency
* Differences between the preview and the output image
* The color-managed preview in RawTherapee is (and has always been) based on image data in the Working Space profile. Although the actual preview is rendered using a monitor profile (or sRGB profile, if the monitor profile is not specified), it does not reflect the Output Profile & Output Gamma settings. This can lead to a slightly different output rendering when Working Space profile and Output Space profiles are not the same. You should set them to the same values to ensure the preview accurately reflects the final rendered output.