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Apps with 'Data portability' feature
Sumatra PDF is a slim, free, open-source PDF/DjVu/EPUB/XPS/CHM/CBR/CBZ/MOBI/FB2 viewer for Windows.Why another PDF reader? Small screenshot tool with support for OCR, Office export, annotations, and more. A hierarchical note taking application, featuring rich text and syntax highlighting, storing data in a single xml or sqlite file. Whether it's bookmarks or passwords, files or shopping lists...Turtl organizes it all and makes it easy to find later. Sync across your devices. Leave nothing behind. Kiwix enables you to have the whole Wikipedia at hand wherever you go! You don't need Internet, everything is stored on your computer, USB flash drive or DVD!. The Data Transfer Project (DTP) is an open-source initiative which features data portability between multiple online platforms.