Speare is described as 'The big challenge with writing is organizing all your ideas' and is an app in the Office & Productivity category. There are more than 100 alternatives to Speare for a variety of platforms, including Mac, Windows, Online / Web-based, iPhone and Android. The best alternative is Obsidian. It's not free, so if you're looking for a free alternative, you could try Standard Notes or Notion. Other great apps like Speare are Microsoft OneNote (Freemium), Evernote (Freemium), CherryTree (Free, Open Source) and Zim (Free, Open Source).
With so many tools, it's hard to keep everyone on the same page. Notion is a new tool that unifies them all. It's like Google Docs, but everything is organized and discoverable by your team. Real collaboration in real-time.
Zettlr is a supercharged markdown editor that combines many writing editor features and collect them in one application. It aims at speeding up your workflow and help you write without any interruptions.