showFoto - ShowFoto is the standalone image editor of the digiKam project.

Bananatag - Find out what happens to your emails after you press send! Add email tracking, attachment tracking, email scheduling and templates to your daily emails.

PhotoDemon - Lightweight portable BSD licensed photo editor for Windows focused on performance and usability.

GetNotify - GetNotify is a free email tracking software solution.

PhotoFlare - Quick, simple but powerful Cross Platform image editor.

Intelliverse Email Tracker - Intelliverse Email Tracker provides insights to increase the ​productivity of your emails.