- A "durak" card game. Was real-time with the server in Java. Also full of bugs because I had no clue what I was doing wrt multi-threading and I also didn't know what defensive programming even is.

- A demotivator-style meme generator.

- A gambling thing that resembled those once-popular "pillar" machines found in grocery stores and malls around Russia. IRL ones took 5-rouble coins, mine took VK votes. VK killed it by deprecating the API for apps to give votes to users.

- A music player with playback speed control. Mostly for shits and giggles :D

There were more smaller ones, all kinds of experiments, but they didn't catch on.