Dataset #1: Database containing 9 categories of computer printed Arabic text snippets
https://drive.google.com/file/d/1dC7pwzT_RHL9B42H8-Nzf5Sant-86NV6/view

Dataset #2: A dataset for online Arabic calligraphy. A collection of 2500 annotated calligraphic styles
https://github.com/ARBML/Calliar

Dataset #3: dataset contains 60,000 training images, and 10,000 test images for hand-written digits
https://www.kaggle.com/abdelwahed43/arabic-handwritten-digits-recognizer/data

Dataset #4: 20,000 images were generated from each class, Ruqaa and Nastaliq (Farsi), creating a dataset of 40,000 synthesized image. When combined with the previous 516 real image, the final dataset contains 40,516 images, which will be refered to as RuFa dataset.
https://paperswithcode.com/dataset/rufa