Brands of the World - Open source database of brands vector logos
Logo Foundry - Logo Foundry is a professional Logo Design Suite App for Android and iOS that let's you create professional branding for your business in Minutes.
LogoSear.ch - Instant search through 200K+ SVG logos from 100+ sources
Iconjar - Store all your icons in one place, just a click away
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Logo Dust - Free logo designs for your projects, added every week