Okular - Okular is a universal document viewer based developed by KDE.
footnote - A beautiful, fast, and simple note taking app in the style of elementary
Sumatra PDF - Sumatra PDF is a slim PDF/DjVu/EPUB/XPS/CHM/CBR/CBZ/MOBI viewer for Windows.
Nikabot - A Slackbot that keeps track of what your team is doing so you don't have to.
Foxit Reader - Foxit Reader is a free and light-weight multi-platform PDF document viewer.
TINYpulse Engage - Increase Your Employee Engagement. Instantly.