When comparing vectoricons vs Openclipart.org, the Slant community recommends vectoricons for most people. In the question“What are the best resources for public domain icons for apps?” vectoricons is ranked 6th while Openclipart.org is ranked 8th. The most important reason people chose vectoricons is:
Most of the icon sets have wtfp license which means you can do whatever you want with them.
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Pros
Pro WTFPL
Most of the icon sets have wtfp license which means you can do whatever you want with them.
Pro Professionally made icons
The icon sets on the site look really cool. Most of them are minimalist designs, which I prefer.
Pro Mature repository of free vectors
It's been online since early 2000's.
Pro Remix available
Just like dribbble, you can upload modified versions based on someone else's work and link it within the platform.
Pro Personal account feature
Group, comment, and upload your own svg's.