Favorite things - wonderful last minute Christmas gifts for nerds like me

Much of this post is a repost from last year, but has been updated with new things I have fallen in love with over the last year.

Heads up, there are plenty of affiliate links in this post, but all links are things I truly love myself and would gift to my own friends.  Well, not my friends because none of them would love this shit, but you get the idea. 

Also, if you don't want any of this stuff, but still order on Amazon, if you click any of the links below and order what you were going to order anyway, I still get a little kick back.  Pretty sweet!

Need last minute gifts for the hippy or nerd in your life?  Don't worry, your Fairy Dorkmother (me) is here to help.

Inexpensive - under $20
Medium priced - $30 ish
Eh, starting to make my wallet sweat - under $75
Ack, my mother-in-law is a hag and I'm desperate for her approval, so I'm willing to spend the money (PS: My MIL is not a hag.  I actually love her dearly):
I made a lot of homemade presents this year, but I still love to gift some of my store-bought favorite items to people I love. 

What is on your Christmas list this year?