I once rebuilt an internal employee directory tool, and added the ability for people to add an emoji below their name.

Before that, hardly anyone used the internal directory, which is probably why I inherited it (I was the stig). After the feature was added, people went nuts and used it all the time. I feel bad for the guy who runs it now, as I understand he is bombarded with feature requests from the employees.

Making things a little bit fun and personal yields engagement, who would have thought.

Obligatory mention of Hypnospace Outlaw, a game where you play a moderator of a 1990s AOL-style internet (right down to the tiled backgrounds and flame gifs) and uncover a mystery.