Joyce Image Converter supports 48 image formats, converts in batches and can be run by command line. Besides it works with any icon size, can resize, rotate, mirror images or change color resolution. The tool doesn't require any special knowledge.
Joyce Audio Converter is all-in-one solution. It deals with MP3, WAV, OGG, WMA, FLAC, CDA, ACC, APE, MPP, changes size, bitrate or frequency. Batch conversion and command line are also available. To use the program no special knowledge is required.