Sumatra PDF is a free PDF, XPS, DjVu, CBZ and CBR reader for Windows. Sumatra PDF is small and starts up very fast. Simplicity of the user interface has a high priority. Portable version included (a single executable that can be run e.g. from USB drive and doesn't write to registry).
Changes in this release:
- support for CHM documents
- support touch gestures, available on Windows 7 or later. Contributed by Robert Prouse
- open linked audio and video files in an external media player
- improved support for PDF transparency groups