Wondershare PDFelement is a full-featured PDF editor that can recognize text in scanned PDFs and images in 23 languages. It can convert files to and from many formats, and it's got tools to create, edit, protect and sign PDFs. It's available for Windows, Mac, iOS and Android, so it's good for whatever computing platform you use.
Mathpix is another powerful tool that uses sophisticated OCR technology to turn images, handwritten notes and PDFs into editable documents. It can recognize mathematical equations, chemical diagrams and text in many languages. Mathpix can convert documents into many formats, but it's geared for educational uses and bulk digitization.
PDFgear is free, full-featured PDF software that includes OCR technology to extract text from image-based documents. It also has tools to read, edit, convert, merge, sign and annotate PDF files. PDFgear is available on Windows, Mac and mobile devices, and it has an AI-powered editor for easy PDF manipulation.