FxFoto 

A single tool to organize, archive, enhance, and create collages with your digital photos. It gives novices to advanced amateurs easy and complete software with unique ways to publish and scrapbook photo memories. The Standard Edition is Really Free!
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Mixere 

Mixere is a free Windows application for mixing audio files. Its simple, spreadsheet-like interface is ideal for live performance, and especially sound collage. Dynamic looping, fully automated sliders, gradual mute/solo operations, and more.
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