todoZero is described as 'combines your notes and to-dos in one place' and is an app in the Office & Productivity category. There are more than 100 alternatives to todoZero for a variety of platforms, including Windows, Mac, Online / Web-based, iPhone and Android. The best alternative is Joplin, which is both free and Open Source. Other great apps like todoZero are Standard Notes (Freemium, Open Source), Notion (Freemium), Google Keep (Free) and Microsoft OneNote (Freemium).
WizNote is a Note software, which is especially designed for Internet users and mobile Internet users. WizNote focuses more on notes of rapid collection, management, reading and sharing. WizNote is smaller, more stable, and more suitable for computers, phones and mobile devices.
Foam is a personal knowledge management and sharing system inspired by Roam Research, built on Visual Studio Code and GitHub. You can use Foam for organising your research, keeping re-discoverable notes, writing long-form content and, optionally, publishing it to the web.
NixNote, formerly Nevernote, is an open source client for Evernote . It is written in Java so it will also run on Windows & OS-X, but the primary focus has been to try and get a usable environment for Linux.
2Do lets you take a completely different approach to managing your tasks. With its extremely simple-to-use interface and a comprehensive and flexible set of powerful features, it lets you focus on what's most important to you: your life.