PyWavelets is a Python module for calculating Simple and Inverse Discrete Wavelet Transform, as well as Wavelet Packets and Stationary Wavelet Transform.
rdiff-backup backs up one directory to another, possibly over a network. The target directory ends up a copy of the source directory, but extra reverse diffs are stored in a special subdirectory of that target directory, so you can still recover files los
K. Rivers, E. Harpstead, und K. Koedinger. Proceedings of the 2016 ACM Conference on International Computing Education Research, Seite 143--151. New York, NY, USA, ACM, (2016)