Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.
Haihaisoft PDF Reader - Haihaisoft PDF Reader is the name of a free to use PDF reader and printer that is extremely simple to launch.
Joplin - Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, tagged and modified either from the applications directly or from your own text editor.
eXPert PDF Reader - eXPert PDF Reader is a free to use PDF reader and views for the Windows operating systems.
Google Keep - Capture notes, share them with others, and access them from your computer, phone or tablet. Free with a Google account.
Flipping PDF Reader - Replace the standard Adobe PDF Reader with the nice flip book. The Flipping PDF Reader allows to read PDF documents in user friendly interface with flipping book effect.