Somnote is described as 'Record and save important information, brilliant ideas, and moments of everyday life easily and securely with SomNote' and is an app in the Office & Productivity category. There are more than 100 alternatives to Somnote for a variety of platforms, including Windows, Mac, Online / Web-based, Android and iPhone. The best alternative is Joplin, which is both free and Open Source. Other great apps like Somnote are Standard Notes (Freemium, Open Source), Google Keep (Free), Microsoft OneNote (Freemium) and Evernote (Freemium).
Note-ify it's an elegant, simple and easy-to-use application made in minimalistic design developed for the iPhone and iPad. It will help you quickly and easily save your thoughts, ideas and all necessary information in the form of text notes.
Geeknote is an opensource Evernote console client for Linux, FreeBSD and Mac OS X. Use it for system administration needs, creating notes, notebooks, sync your local directories with Evernote notebooks.
Write beautifully. Organize easily. Find everything. Fuss free writing. Saves notes as RTF files on user specified folder. Can search across all notes. No sign up/log in required. Portable application.
Shuffle, a personal organizational tool, styled around the Getting Things Done methodology. Shuffle is a dumping ground for ideas and tasks. It lets you rapidly create and organize your actions, relieving you of the stress of trying to remember everything you need to get done.