• Ebook manager: Calibre

  • Kindle PDF optimizer: k2pdfopt

  • PDF Border Cropper Briss

  • CHM File Extractor archmage

  • PDF editing Xournal

  • convert images to PDF

      sudo apt-get install imagemagick
  convert *.jpg pictures.pdf

  • convert between different formats:

          sudo apt-get install calibre
      ebook-convert xxx.mobi xxx.txt --unsmarten-punctuation