Taskful - Deadlines, meet your match.
LiquidTime - Smite procrastination. Plan, allocate, and track your time by making every task fit.
Calendarist - Time blocking companion for Google Calendar
Gooba - Writing app and task manager.
Gone - An ephemeral to-do list
Valheim - Valheim is an Action-Adventure, Historical, War, Strategy, Single-player, and Co-operative Multiplayer video game by Iron Gate B.