Free OCR API, Online OCR and Searchable PDF (Sandwich PDF) Service. Web API to extract text from images and convert scans to searchable PDF. Free OCR software as a hosted service and as download.
Just easily snip for a formula image or upload from local, you can quickly get the LaTeX expression for the mathematical formula! SimpleTex supports fast insertion of image/MathML/LaTeX and other formats to major document editing software, which could greatly boost the work efficiency. Best of all, SimpleTex is free and developed by college student!