During the past few years, I've created over 70 Desmos activities, mainly for the teachers and students I have supported as an instructional coach in my district. Many of these activities have not been uploaded to the Desmos Bank. I apologize.
*UPDATE: I highly encourage you to visit the Desmos Bank to both look for activities and upload your activities. 

However, I created a Desmos Activities spreadsheet of most of the activities I've made. First and foremost, the purpose of this spreadsheet is for me to be more organized with all of these activities so I can find them quickly. Secondly, it's a useful resource for teachers I work with during workshops. Finally, if you have a lot of desmos activities, I encourage you to create your own spreadsheet so it's easier to find your own activities. Here's how it works.

Sorting:
You'll notice you can sort the spreadsheet by any column you desire. It's currently sorted by Grade Span. My purpose with choosing the grade span is to be as inclusive as possible. Take an activity labeled "6-7" for example. From my experience, this activity could be used to introduce a concept in 6th grade and be used again in 7th grade to continue student development of that concept.

Title:
Some titles are self-explanatory, others are not. This is the result of me trying to be witty. Head over to the "topic" column to decode those mysteries.

Topic:
The topic should help share a little more information, kind of like tags. Still unclear, head over to the "Notes" column for more information.

Type:
Most activities linked are from Desmos Activity Builder. However, there are a few Polygraphs I've made and even fewer Desmos calculator links. If something is marked PD, I have used it with teachers during professional development workshops for various reasons. 

Rating:
The rating system is completely arbitrary and determined by me. Ha! 
If an activity has:
• 4-5 stars; the activity is pretty polished and I've been happy with how it has performed in classrooms with students.
• 3 stars; the activity could use a little more classroom testing and fine tuning.
• 2 or fewer stars; the activity is more of a rough draft and I haven't had a lot of time to fine tune.

FAQs:
There's a Frequently Asked Questions tab at the bottom that provides answers to questions I've already received.
Check there before contacting me about any questions you might have.

I hope this spreadsheet is helpful and inspires you to create your own desmos activities and/or spreadsheet of activities.

Please let me know in the comments if you use this spreadsheet and have feedback for me. 

I recently received an email, requesting a quote in "one or two sentences" explaining the essence of Estimation 180 as a routine. I had two immediate thoughts:
1) I'm honored at this request because I both truly appreciate the request and am flattered that the work I've put into Estimation 180 has inspired so many other students and educators.
2) I enjoyed the challenge to capture the essence of Estimation 180 in one or two sentences. 

Based on your experience, I'm curious how you would best describe the essence of Estimation 180 in one or two sentences. I could be a jerk and have you first leave your description in the comments before I share mine... but I won't do that.
​I would still love to hear your description, so feel free to add it to the comments.

Here's what I submitted:
Estimation 180 provides students with opportunities to strengthen their number sense and mathematical thinking through the use of engaging visuals and rich discourse. 
The visuals at Estimation 180 allow students to engage in mathematical conversations where students are encouraged to support their mathematical claims with evidence and reasoning.