What free AI tools should I add to my websites (Flowzy & TheTrendingTopic) to make them 10x better?

Hey Indie Hackers!

I run two sites:

1. Flowzy.xyz – A platform for automating and speeding up workflows (currently adding features).

2. TheTrendingTopic.tech – A site that fetches the top trending topics from Google, Instagram, YouTube, and Twitter so creators can turn them into shorts or videos, with SEO and hashtag suggestions.

I’m looking for free or freemium AI tools/APIs I can integrate to make these platforms more valuable and unique (think AI video, chat, analytics, automation, or anything that can make them stand out).

What are some must-have AI tools or features I should be adding?
Would love your recommendations!