The Bat - The Bat! is a secure desktop email client for Windows, designed to protect your correspondence against third-parties and to save your time.
FileCenter - Scan & organize documents with our paperless scanning management software. Perfect to organize & manage any kind of file. ✔ Try FileCenter FREE today!
Mailspring - Mailspring is a mail client for Mac, Windows and Linux.
DEVONthink - DEVONtechnologies develops DEVONthink, DEVONagent, and other Mac and iOS apps for document and information management and web research.
Geary - Geary is an email application built for GNOME 3.
Simple Doc Organizer - Simple Doc Organizer is an intuitive and easy to use software that allows you to archive, organize and manage your documents and save them on local or server database.