Blick auf die Staumauer Grand Dixence und den Lac des Dix.
BorgBackup (short: Borg) is a deduplicating backup program. Optionally, it supports compression and authenticated encryption.
Pressbooks is a book content management system which exports in multiple formats: ebooks, webbooks, print-ready PDF, and various XML flavours. Pressbooks is built on top of WordPress Multisite, and makes significant changes to:
Sigil is a multi-platform EPUB ebook editor (think Word or LibreOffice but specific for EPUB ebooks).