Iconmonstr is a free icon library (4,784+ icons across 316 themed collections) from a single long-running project, offering most icons in both filled and lined variants.
Having a completed filled and lined pair for nearly every icon avoids needing a second library just to get the opposite weight for active and inactive states.
Good for projects wanting broad category coverage from one consistently styled free source rather than assembling filled and lined icons from separate sets.
Free to use under Iconmonstr's own license agreement, not a standard MIT or CC license, so read the site's license page before commercial use; delivered as SVG with PNG previews on-site.
