Sindhi scripts
and history at omniglot: http://www.omniglot.com/writing/sindhi.htm
Khudaadi script: Department of History, University of Michigan : http://std.dkuug.dk/JTC1/SC2/WG2/docs/n3871.pdf
Arabic & Devanagari script: /www.unics.uni-hannover.de/nhtcapri/sindhi-alphabet.html