I forget what the circumstances were that spawned this mod, but it's been more useful than I initially expected to be for something so simple. Egg History just lets you right click an egg in Help Mode (use F1 to toggle Help Mode on and off) to bring up its creature history, similarly to when you right click a creature in help mode. I would highly recommend pairing this with Zzzzoot's Creature History Update so you can more easily see the parents of an egg. This has made my life a lot easier in overpopulated nurturing worlds where I find myself having to pick and choose which eggs to hatch. I hope it helps you out too!
Download it here!
Download it here!