If you want to turn some text you've written into an audiobook you can listen to for better learning, Audioread is a good option. It uses AI to convert text into speech, with impressively realistic voices. The tool is available on the web, as a browser extension, for iOS and Android, and can handle a variety of text sources like emails, PDFs and articles. Audioread also offers a private podcast RSS feed so you can subscribe and listen to your audio files in your favorite podcast apps.
If you want a tool that's good for a variety of situations, Narration Box offers good-sounding, natural voiceovers in more than 140 languages and accents. It's good for audiobooks and e-learning, but also for other uses. Narration Box has a simple interface, a library of 700+ AI narrators and advanced controls for voice inflection and pitch. It also has flexible pricing tiers, including a free option, so it's good for many people.