YC-backed @Mintlify (YC W22) just announced a $45M Series B round, bringing their total funding to $67M, to "accelerate [their] mission of building the knowledge infrastructure for AI."

Read in their blog announcement:

Mintlify now powers documentation for over 20,000 companies, with content reaching more than 100 million people every year. This round accelerates our mission to become the knowledge layer that makes products understandable, usable and discoverable by AI agents.

I'll start.

Supabase. Found it here three years ago. Thought it was just another backend. Now I can't imagine building without it.

Here's what it does for us at Rankfender:

Auth that doesn't make you crazy. We have users across 120+ countries. Supabase handles sign-ups, logins, password resets, magic links, OAuth with Google and GitHub. It just works. We didn't have to build any of it.

Today, the productivity domain in tech is very well developed - there are tools for almost any need!

But at the same time, there s always a feeling that there might be something else, something better. All the time.

What I like about this space is that once people start using tools like Miro, Notion, Trello, ClickUp, etc., they tend to keep testing new things and experimenting with different tools.

We all have that one tool - the unsung hero quietly doing its job and saving you hours every single week.

For me (no surprise ), it s @Clueso

Notion, Obsidian, and Roam are great, but they re not for everyone. Maybe you found something simpler, faster, or just less overwhelming. What s the one productivity tool you actually stick with the one that makes life easier instead of adding more work?

Happy Tuesday
What are the most well-designed open-source products from your point of view?
My favorites:

• @Supabase

• @Appwrite

• @Cal.com

• @Dub

• @Documenso

• @Hanko via @lxunos

Would love to have your suggestions
Thanks!