Tesseract - Tesseract is an optical character recognition engine for various operating systems
Buno - Simple Note Taking - Simple, minimal & easy note-taking
Onlineocr.net - Free Online OCR service allows you to convert PDF document to MS Word file, scanned images to editable text formats and extract text from JPEG/TIFF/BMP files
Chars - Unicode Symbols Keyboard for iOS
ABBYY FineReader - ABBYY's latest PDF editor software, FineReader 16 you can easily convert files like PDF to Excel, PDF to Word, edit, share, collaborate & more with this PDF editor!
QuickJots - Jot down quick notes and auto-save them with QuickJots. Use GitHub Flavoured Markdown to easily embed images, or even task-lists to track to-dos. It's private — all notes stay local; no login or downloads are needed. There's a dark mode too!