Online Games I've found. Some are rather obscure.
Links:
Structure Odd Idle Game
Cookie Clicker of course
Level 13 Odd game that is a mix between a text based exploring game and an idle game
Nested A rather interesting display of nested objects
Never Ending Legacy A strange risk between an Idle and Strategy game (One of my favorites!)
Structure A strange tower defense game where you only upgrade one tower(quite literally)