V 5.13.0
calibre is a powerful and easy to use e-book manager

V 9.7.0.0
WinNc is a tabbed file manager for Windows

10.1.1.37576
Foxit Reader is a free PDF document viewer and creator, with incredible small size, breezing-fast launch speed and rich feature set

20.9.1.15848
Get the Adobe Acrobat Reader mobile app, the world’s most trusted PDF viewer

Latest
The shared functions of each version of Office, and enter into even more detail on the crucial applications of Word, Excel, PowerPoint

4.0
Creating a PDF with this free PDF converter couldn't be easier