flatpak is tool similar to 0install. You can find more details here.
# Get the gnome-sdk gpg keys
# Add the keys to trusted keys
flatpak remote-add --user --gpg-import=gnome-sdk.gpg gnome https://sdk.gnome.org/repo/
# Install pre-requisite gnome
flatpak install --user gnome org.gnome.Platform 3.20
# Download the flatpak file and install it. Or you can follow the next step.
flatpak install --user --bundle LibreOffice.flatpak
# Install flatpak without downloading
flatpak install --user gnome org.gnome.Platform.Locale 3.20
# Run you brand new shiny latest libreoffice
flatpak run org.libreoffice.LibreOffice
# At a later date, when you want to update libreoffice.
flatpak update --user org.libreoffice.LibreOffice
LibreOffice 3.5 was released few days back with loads of features and improvements. Most bragged about feature should be capability to read visio diagrams. You can read the full list of features here. And here are some interesting features:
Better UI for header/footer handling. Easily add header or footers. Quickly see what is edited with new changing text boundaries. Quickly edit or remove headers and footers without going through page styles formatting. (Cédric Bosdonnat)
New faster built-in grammar checker for English and several other languages. (László Németh)
New multi-line input bar in Calc. The arrow-control at the end of the toolbar allows to switch this on/off. (Anurag Jain, Noel Power)
Import filter for Microsoft Visio documents. (Fridrich Štrba, Eilidh McAdam, Valek Filippov)
Custom Shapes import was greatly enhanced, many bugs were fixed and new presets implementation added. (Radek Doulik)