These emoji are available for personal use, but if you rehost them or such, you should credit them to their original creators and Ilzo. Everything's some variant of Creative Commons.
The following emoji are derivatives of dzuk's Mutant Standard Emoji. They are available under the CC BY-NC-SA 4.0 license. The pensive rat also takes shapes from the Twemoji pensive emoji, which is under a CC BY 4.0 license.
This column emoji is inspired by Mikepanhu's gamepad-column icon. It is not a traceover. However, let's still call it CC BY-SA 3.0 just to play it safe.
This lampshade is a derivative of the old TVTropes logo. While TVTropes is CC NC-BY-SA licensed, that doesn't necessarily mean you can use this for your own logo or such! As an emoji it's hopefully fine though.