Okular - Okular is a universal document viewer based developed by KDE.
MS Paint IDE - The most partially downloaded IDE on the internet
Sumatra PDF - Sumatra PDF is a slim PDF/DjVu/EPUB/XPS/CHM/CBR/CBZ/MOBI viewer for Windows.
Etherpad - Etherpad is a highly customizable Open Source online editor providing collaborative editing in...
Foxit Reader - Foxit Reader is a free and light-weight multi-platform PDF document viewer.
Zoho Writer - Create. Review. Distribute