Open source makes the technology world go ’round, forming as much as 90% of the modern software stack via frameworks; libraries; databases; operating systems; and countless stand-alone applications.
The 10 coolest open-source software tools in 2025 include software for developing AI agentic applications, managing streams ...
Open source software is a vital part of modern computing; it’s involved in much of the software we use every day. But is it too good to be true, and is it really free, in either sense of the word?