Elephant is described as 'notetaker with a classic interface you already know. Keep your notes to yourself. No accounts or clouds. For syncing use Dropbox, Github, rsync, ... No feature bloat or redesigns, ever' and is an app in the Office & Productivity category. There are more than 100 alternatives to Elephant for a variety of platforms, including Windows, Mac, Android, iPhone and Linux. The best alternative is Joplin, which is both free and Open Source. Other great apps like Elephant are Standard Notes (Freemium, Open Source), Google Keep (Free), Microsoft OneNote (Freemium) and Evernote (Freemium).
Writeaday is a novel journal app for the modern thinker. Integrates the power of streaks but in a visual color gradient form. There are hundreds of journaling apps out there - like, literally hundreds. We really think we have a novel concept for this old school genre.
Notebook PEAs - encryption of notes. Protects your private notes with a password. The text is never stored unencrypted on your disk (until you explicitly decide to do that). The used cryptographic primitives are currently considered as safe as possible.
PNotes (Pinned Notes or Portable Notes, use what you prefer) is written entirely in C and Windows API (with Pelles C for Windows IDE) - so it is fast and light-weight. It has flexible settings - both for the program in whole and for individual note.