SUM Calculator

This is a PORTABLE app bundle for WINDOWS. No installation required!
(Uncompressed size is about 60Mb because of required libraries for all Windows versions from XP to 10. The application is incomparably small.)

Unzip, run sumcalc.exe. That’s it!
You can put the folder wherever you want, except system folders with permissions (e.g. Program Files), and create a shortcut if needed.

Cross-platform source and info:
https://github.com/qandak/sumcalc

Changelog:
https://github.com/qandak/sumcalc/blob/master/CHANGELOG.md

Today’s small-to-medium-sized (SMB) businesses and large enterprises are saving on their monthly communications costs by making one simple decision: to switch to a VoIP service solution from their old, outdated Plain Old Telephone Service (POTS). By choosing a new VoIP service, these companies enjoy the flexibility, reliability, call features, and audio quality that only a VoIP service can provide. Plus, they cut their phone bill by up to 70%!