Some projects...
Some r-pi projects
Turn a Raspberry Pi into a advanced and highly configurable web filter and parental control proxy with Privoxy, Squid and SquidGuard
Turn a Raspberry Pi into a wireless access point with transparent Squid and SquidGuard proxy
Backup multiple r-pi on an external USB drive with rsnapshot
Turn a Raspberry Pi into a VPN server with OpenVPN
Turn a Raspberry Pi into a VPN server with Wireguard
Deploy IoT Gateway and Node on TTN