Wikipedia is a first-blush guess. It was software to allow immense distributed human knowledge from non-technical (or lightly-technical) people to all people.
simonsarris | 2 hours ago
Probably the software which lets you stay in contact with your mom or girlfriend/boyfriend, friends etc. And for many people on Earth that's WhatsApp or whatever else messenger service you use. (yes, I ignore all the layers below that)
therealmarv | 2 hours ago
The C Compiler
Nearly all microcomputer software that's ever been run was built on system foundations built by the C compiler, and/or an OS kernel built by the C compiler.
taylodl | 2 hours ago
Anything that was certified as 100% Pure Java
tjr | 2 hours ago
The Linux kernel
JSDevOps | 2 hours ago
Whatever software that allows distributing (and watching) porn over computer networks. It pushes technology further, to cause more happiness. And it causes happiness because it pushes technology further (and because of 1 more thing). The perfect circle.