TPFC: https://www.portablefreeware.com/?id=3090
QwikTape @ https://github.com/4silvertooth/QwikTape/
After installing you can copy qwiktape.exe, sciter.dll and sciter-pdf.dll to another folder, uninstall and it seems to work - looks portable at very quick glance, I see some entries in the registry (that the program was executed) but nothing in AppData by the looks of it.
Make it Portable: Create "qwiktapes.db" in the application folder, or if there is already one in your documents\user folder move it to the application folder.
Installer does ask if you want to create "start menu" and "desktop" shortcuts, just say no
Features
- Write text, calculate, annotate it like you would on a paper or in a book.
- Never forget what was the calculation about by annotating it.
- Do calculations like addition +, subtraction -, division ÷, multiplication ×, percentage % and power ^.
- Create unlimited tapes using [+] button in tabs bar, switch between tapes using tabs.
- View/Rename/Delete your saved tapes in the Bookmark menu, use the top left menu to view all tapes.
- Tapes are auto saved.
- The numbers will auto format and auto indented as you type.
- Numbers are formatted according to the locale.
- User can define variables and use it in calculations.
- Hover cursor over variables to check it's value.
- Customize colors using the settings menu, number of decimals to use and indent length can be changed too.
- Tape calculation doesn't use operator precedence, the results will be as you would type it on a calculator.
- Expressions use operator precedence. myvar = 1 + 2 × 3 myvar is 7.
- All the calculations are done with infinite precision, so 0.1 + 0.2 = 0.3