More about calibre
Kovid Goyal distributes calibre 100% for free. This program refers to Productivity, E-books. Versions 4.4 and 4.3 are still the most downloaded ones and can be run on Windows 8/8.1/10. The most popular installation files for the software are calibre.exe and calibre (Mac).exe. The antivirus analysis of the direct download link proved it to be safe.