Open-source Google Forms alternatives

2 open-source alternatives to Google Forms, curated: Ikiform, OpnForm. Each is open-source; compare license and links below.

Tool	What it is	License	Open source
Ikiform	OSS alt to Google Forms; ~354 stars; via openalternative.co	MIT	yes
OpnForm	OSS alt to Google Forms; ~3547 stars; via openalternative.co	AGPL-3.0	yes

Positioning is each tool's own description; open-source status is evidence-based. See each linked entry for details.