Tinitell - Wearable mobile phone for kids. GPS enabled.
GOG.com - DRM-free game store, selling both new and old titles. No clients required.
Toymail Talkies - Toys that connect people
itch.io - An online game marketplace and community.
Kids in Touch - A safe, fun, messaging app for kids monitored by parents
GnuPlot - Gnuplot is a portable command-line driven interactive data and function plotting utility.