Hiro is described as 'let's you organize things with simple text snippets. It even works for the most chaotic people' and is a Note-taking Tool in the Office & Productivity category. There are more than 100 alternatives to Hiro for a variety of platforms, including Windows, Mac, Online / Web-based, Android and iPhone. The best alternative is Joplin. It's not free, so if you're looking for a free alternative, you could try Standard Notes or Google Keep. Other great apps like Hiro are Microsoft OneNote (Freemium), Evernote (Freemium), Simplenote (Free, Open Source) and Raindrop.io (Freemium, Open Source).
CryptPad is a private-by-design alternative to popular office tools and cloud services. All the content stored on CryptPad is encrypted before being sent, which means nobody can access your data unless you give them the keys.
Notezilla is the leading sticky notes app for Windows, Android, iPhone/iPad and the web. Set reminders to sticky notes, Pin sticky notes, attach them to websites, docs & folders, sync between PCs and other devices, organize using folders and tags.
RedNotebook is a graphical diary and journal helping you keep track of notes and thoughts. It includes a calendar navigation, customizable templates, export functionality and word clouds. You can also format, tag and search your entries.