Krzysztof Kowalczyk

Krzysztof Kowalczyk is a developer of productivity and design & photo software. The current developer portfolio contains 15 programs. The most popular software is SumatraPDF with over 2 thousand installations on Windows PC.

Best software by Krzysztof Kowalczyk

Reads many file formats.
It is free PDF Reader with multiple functions, languages and features.
Sumatra PDF
PDF, ePub, MOBI, CHM, XPS, DjVu, CBZ, CBR reader for Windows.

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Goodbye Windows 8.1

Goodbye Windows 8.1

After Windows 8 outlived its mainstream support two years ago, it's now time to...