Internet obscuridae: The items below are a reference to something. What?

This question will eventually replace the YC one I posted on the 5th.

Cracked by: shrik, raklodramA, username, mankuTimma, Sumanth Patlolla, Mukul, SV, apar, v.chandrashekar, jowens, Rogi, Bharath, dineshk, Mikey, Pawankumar Hegde, byslexia, SS, krudebox, Thejas V R, Raghuvansh, udupendra, Rahulk, nishansolo, Ananth and Dibyo