Not sure it's worth the time looking for free credits. Even if you get a year for free you'll end up saving maybe $500 max. If you're worried about costs, look

Not sure it's worth the time looking for free credits. Even if you get a year for free you'll end up saving maybe $500 max. If you're worried about costs, look for alternatives. In the apps you've listed, only Figma is a real useful app. Notion is just documents, a markdown editor and a shared drive will give you 99% of Notion you need. The rest is overengineered anyways. Github free tier gets you pretty far already. Slack is just chat, tons of free alternatives there.