After I learned about Tesseract I immediately wanted to use it. So I made this simple web app.
You can take a picture of a document, edit it on your favorite photo editor, crop the part you're interested in, and feed to the app, so you can extract the text.
I'm also planning using this to extract text from memes, so people with visual impairment can also have a laugh.
Get the app here.
The memes app I was talking about is here - I'm not the creator of the memes, I just scrape them together.