Free Software

Open Source Linux Software Development Software https://sourceforge.net/directory/software-development/linux/
fresh(code) freshcode.club freshcode.club is a reimplementation of FreshMeat/FreeCode.
Free Software Directory http://directory.fsf.org
GNU http://www.gnu.org

digital privacy etc

RAID and File split links

RAIF: Redundant Array of Independent Filesystems

GNU File splitters

General purpose

gfilesplit: Unix GNOME
kjsplit: Unix KDE
PeaZip: Windows

Audio splitters

tape2mp3: ?
wavbreaker: Linux Unix-like

Freeware File splitters

HJ-Split: Mulitple platforms
GSplit: Windows

Other

An unofficial getting started guide for the Fairphone 4 is available: Fairphone 4 unofficial getting started guide