Pichon (by Icons8) for Windows is a

free icon pack

containing a large collection of icons designed in a consistent, modern style. It[SQ]s available for download from Icons8[SQ]s website and likely other sources. These icons are suitable for use in various Windows applications and projects, potentially including software interfaces, websites (if converted to appropriate formats), and presentations. The "Pichon" name refers to the specific stylistic design of the icon set.