SumatraPDF

Sumatra PDF is a free and open-source PDF viewer for Windows. It is known for its lightweight design and simple user interface. Developed by Krzysztof Kowalczyk, Sumatra PDF prioritizes speed and minimal resource usage, making it a popular choice for users who prefer a no-frills reading experience.

The application supports a range of document formats beyond PDF, including ePub, MOBI, XPS, DjVu, CBZ, and CBR. This versatility allows users to open various ebook and comic book formats within a single program. Sumatra PDF's interface is intentionally minimalistic, featuring a tabbed view for managing multiple open documents and a straightforward toolbar. It does not include extensive annotation or editing features, focusing instead on efficient document display.

Installation of Sumatra PDF is quick and unobtrusive. It also offers a portable version that can be run directly from a USB drive without requiring installation on a host system. The project is actively maintained and regularly updated to improve performance and compatibility. Sumatra PDF's emphasis on simplicity and speed has earned it a dedicated user base.