There is no shortage of AI tools that advertise a free plan and then wall off everything useful behind a paywall. The tools below are different: each one does real work without asking for a card, and earns a place in a daily workflow rather than a one-week trial.
For writing and rewriting
Tonewave is the rare free tool that nails a single job. Paste any text and shift it between formal, friendly, persuasive, or concise in a click, with a browser extension that brings the same controls into your inbox.
For developers
Two free picks stand out. Snippetly saves code from anywhere and auto-writes a description and usage example for each snippet, with semantic search so you find things by intent. Regexer turns a plain-English description into a tested regular expression and explains every token, so you actually learn the pattern.
For meetings and audio
Echonote transcribes recordings with speaker labels and produces a clean summary with action items. The free tier is generous enough for weekly standups and one-off interviews.
The takeaway: a capable AI stack does not require a budget. Start free, and pay only when a tool has clearly earned it.