Apache is a free and open-source cross-platform web server software.
Personio is the all-in-one HR software for small- and medium-sized companies with 10 to 2000 employees.
Progressive Web Apps (PWAs) are web apps built and enhanced with modern APIs to deliver enhanced capabilities, reliability, and installability while reaching anyone, anywhere, on any device, all with a single codebase.
TYPO3 is a free and open-source Web content management system written in PHP.