Arabic Scientific Manuscripts of the British Library - Collaborative transcription project:
"Help advance research into automatic text recognition technologies for historical Arabic handwritten texts. Below you will find selected pages from some of the British Library's most important Arabic Scientific Manuscripts. We need your help to transcribe them in order to create a freely available ground truth datataset for anyone wishing to advance the state-of-the-art in optical character recognition (OCR) technology for handwriting."
Read more on the effort: