Lemon Crab
GitHub
What's there to say, GitHub is the house of Software Development for the whole world and it's a great community where talent and fantastic ideas meet and create great products.
Hotjar
HotJar is one of my favorite tools to track users behavior. While Analytics is great to understand how people move across your pages, Hotjar's heatmaps are revolutionary in the way they allow you to grasp what the user wanted during their session.

What's great

heatmaps (5)user behavior insights (9)
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Product Hunt
The best community in the World to launch indie projects, if it didn't exist they should invent it. Easy to use and great to find fun new products to play with!

What's great

user-friendly interface (3)platform for product launches (26)discover new products (21)
Not only it's fun to browse the different profiles, IndiePage is a community of indie entrepreneurs who values transparency and continuous innovation. Another banger by Marc Lou

What's great

transparency (1)community of indie entrepreneurs (1)
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ProtonMail
ProtonMail is the best alternative to Gmail I know. Their commitment to privacy, the free tier, and the modern UI make it a no-brainer when looking for a valid email provider.

What's great

free tier (1)security and privacy (4)modern UI (2)
Figma
Great tools, working as a developer I used Figma a lot for extrapolating the User Interface elements, while more recently I started using the free tier myself for my projects and now I can't live without it!
DaisyUI
Great collection of Tailwind components with constant updates and a comprehensive documentation, everything just work as intended and it saves me tons of time in configuring the UI. When approaching Tailwind, I started with HeadlessUI because that's what's in Tailwind's reference code but I wasn't a fan. Learning about DaisyUI was a game changer, when I need something I breeze through the docs and I usually find it. Daisy is now in all my new projects and I'm never coming back.

What's great

time saving (7)comprehensive documentation (2)pre-built components (5)
Spotify
I should take a star down for their customer service but I won't, Spotify is great and it's one of the tech eccellences in Europe.
Indie Hackers
Great community of common minded individuals