2Jpeg 

2JPEG is a reliable batch graphics converter allowing you to convert images to jpeg format from 50 image file types. The program has no windows interface and processes multiple files at a time. With 2JPEG you can edit images before converting.
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ReaJPEG - Image converter to JPEG 

ReaJPEG is our popular image converter, allowing you to both convert and edit images from most commonly used graphic formats to JPEG. You can convert you images to JPEG either one by one or all at once as a batch job.
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ReaConverter - Professional Image Converter 

ReaConverter makes image conversion and oft-recurring picture editing simple.
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