Productive & Free Tools that you use for daily activities

Hi Friends, I would like to ask you something that's useful for me and helpful for other viners too. Do you use any free tool or platform or chrome extentions ..something like that, that maximize your productivity and helps to do the things in a better way My Tip : I use a chatGPT free version for writing an email, I use the word "Humanize" to make it not sound like GPT email and also for technical doubts I use it to understand the new concept in a simpler manner. I know like there are other tools like Notion for taking notes and ideas 💡 What's yours ?? Thank you 👍