My personal opinion is, don’t bother. I don’t bother to organize my bases at all — instead, I give them good, descriptive, and memorable names. Then, I use the “Base Jumper” command to navigate from one base to another (cmd + K on macOS). That pulls up a search bar, much like Spotlight search on macOS, and I start typing — after just a few keystrokes, the base I am looking for appears as the top option in the choices below, and I hit enter.

Changing the color of the base icons helps me. Also, any sample template that isn’t yet in use has a grey icon.

I have a small team. We use a different base for each major kind of project. So, we’re doing (73) translations, applying for (3) grants, and putting together a collection of (probably hundreds of) supporting materials, and each of those three kinds of projects has a named base.

It sounds like you might want to rethink how you are using bases and views within bases. Views are very powerful and can eliminate a lot of duplication. I can be a rewarding exercise to see where you can combine bases.

If you have a lot of bases, this solution may work for you.

• Create a base and name it : Airtable Bases Structure
  


• Customize this base to contain all bases information that will help you organize your team.


• Each time you create a base, add it to the Airtable Bases Structure.


• Add information about the base, like Created date, Team members, and share it with your team.

This is my solution, posted here. 

TLDR: sync your bases to Google Drive (settings in your Account Overview page) and then sync that folder back to a synced table in a new base. Each record will correspond to a base with a button that takes you directly to that base. Add custom fields and then group/sort away!

Really happy with this workaround - it's easy to implement and works like a charm! Thanks!

Since they reconfigured the community space, the link in my original comment broke.

Here is my workaround to organizing all of my Airtable bases using Google Drive.