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AudioBookConverter
Improved AudioBookConverter based on freeipodsoftware release (mp3 to m4b converter)
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Yermak's Audio Book Converter is the absolute best I've come across, and I love it dearly. It supports mp3, m4a, and even opus/ogg (my personal preference, because of its unbeatable compression-quality ratio).
NOTE:
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Hence, a higher number means a more popular project.