Opendias - Opendias is a professional document scanning and storage utility for the home user.
Teedy - Teedy is a lightweight document management system packed with all the features you can expect from big expensive solutions but still easy to use.
Docufy - FREE Android document scanning app. New features. Manage your documents and scan to PDF. Sync to Google Drive automatically. Add notes and handwriting.
Paperless - Developers and publishers of Mac, Win, and iOS productivity, home and office and writing software such as MacGourmet, Paperless, MacJournal and many more. Based in MN.
eDoc Organizer - eDoc Organizer is a document management software solution for home and small business users.
Paperless-ngx - paperless-ngx has 6 repositories available. Follow their code on GitHub.