Photoimp is a simple but well-designed photo manager with some surprising features.

The program has a clean, uncluttered interface, with a single toolbar containing just a few buttons. And that's fine, as it gives you the maximum amount of space for your image browsing: just click a folder and scroll through its thumbnails.

While this may sound basic, there's real attention to detail here. Photoimp can automatically import images from cameras or memory cards. There's support for viewing a wide range of formats, including PSD and various RAW formats (Canon, Nikon, Sony, Pentax, Olympus, Panasonic, Leica). And you can resize the thumbnails, rotate or delete images in a click or two.

An "Export" module can convert, resize and/ or add a simple "lines" watermark to your selected images.

A built-in editor can automatically enhance an image or set the best white balance, while providing manual control over gamma, brightness, contrast, luminance, saturation, temperature, tint or sharpness.

You're also able to rotate images, colorize them, convert them to black and white or sepia, view any EXIF tags, or apply lines, text or image-based watermarks. The latter delivered much more than we expected, too: add a text watermark and you can set its position, font, size, style, colour, opacity, blur and blending mode. Even the optional shadow can be tweaked via six individual settings.

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Sure, it's not Photoshop Lightroom, but Photoimp isn't another feeble me-too image viewer, either. Strong file format support, a capable editor and time-saving batch processing tools mean it's one of the best free photo managers around.