There are many different authoring tools that can be used for online learning, and it can be hard to decide which one is the best for you. Here are five of the best online learning authoring tools:

1. Google Docs: Google Docs is a free, online document editor that can be used for a variety of tasks, including authoring online learning materials. It is easy to use and has a wide range of features, including support for audio and video recordings.
2. PowerPoint: PowerPoint is a popular online presentation tool that can be used to create materials such as slideshows and presentations. It has a wide range of features and is available in a wide range of versions, including free and premium versions.
3. Canva: Canva is an online platform that lets you create visual content, including graphics, images, and videos. It is free to use and has a wide range of features, including support for audio and video recordings.
4. WordPress: WordPress is a popular content management system (CMS) that can be used to create websites and online learning materials. It is free to use and has a wide range of features, including support for audio and video recordings.
5. Adobe Creative Suite: Adobe Creative Suite is a collection of software tools that can be used to create content, including online learning materials. It includes software such as Photoshop and Adobe InDesign, and is available in a wide range of versions, including free and premium versions.

Whichever tool you choose, make sure you use it in conjunction with good online learning planning and design principles to ensure your materials are effective and engaging.