Description: Nagios is an open-source monitoring system that allows administrators to monitor network infrastructure like servers, switches, applications, and services. It can notify users when issues arise and help identify problems in a timely manner.
Type: software
Pricing: Open Source
Description: Numbers is a spreadsheet app developed by Apple for macOS and iOS. It features calculation, graphing tools, and simple table creation. A good alternative is LibreOffice Calc which is free, open source software.
Type: software
Pricing: Open Source