One of the biggest and most useful of those tools is a Django web interface that accepts JPG/PNG/PDF file uploads of scanned documents and in case of images (JPG/PNG) it will run "tesseract" to OCR extract text from the images (in case of PDF it will pdf2txt). The extracted text is stored in an SQLite database which enables keyword search in the uploaded documents.
I use this as my (digital) archive of important documents, e.g. mortgage, bank statements, insurance, medical files, etc. I just checked and I now have 1129 documents in there ranging all the way back to 2006 .
It's super useful to be able to go back in time digitally, without having to dive into the collection of physical binders with the real documents (ordered by year and month but nothing beyond that, given that there are usually only a handful of documents per month, and I can use the web interface as an index into the physical archive, if I ever need it).
