For those reading: after you select a collection, there is a small "i" icon at the top of the screen, near the search bar. Clicking it gives a link to the source and license info!
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Though as others have mentioned: beware that there is still obviously-trademarked stuff in there, and ones that may require attribution; check the source to be sure. If you're looking at a specific icon, there doesn't seem to be an obvious way to get back to the collection it came from (and thus see the original license terms).
The availability of trademarked icons (such as Google and Amazon, linked by others) makes me think they just crawled for SVG icons and slapped an OFL on them, which you can't do.
I guess they crawled all icons from github projects and did not check every icon... I would also double check the license with the source before using it.
> The Amazon logo and the Amazon Smile mark are not permitted in third-party advertising by vendors and sellers linking in to Amazon. The “available at Amazon” logo is permitted for use in advertising.
The main smile logo variants are also permitted for use in "logo line ups", "in a line up with two or more other retailers and not linking in to Amazon."
Most other uses are either not permitted, or subject to conditions, which sometimes involve obtaining written permission from Amazon.
That's just an example, other Amazon logos for other product areas - e.g. their app store - have similar conditions.
There may be some fair use exceptions to all this if used in a context that doesn't involve selling products.
Not a lawyer, but surely something can be both open source and trademarked? As far as I understand those are unrelated concepts. In this context, the “source” is the SVG markup.
The issue is how you use it. Whether the icon SVG markup is open source isn't very relevant if you're not allowed to use it. If you want to personally mess around with it and not use it in any commercial context, no-one is going to care.
I clicked on All Collections, searched for an icon and found a few, but then I wanted to view other icons in it's collection. I don't see a way to do that, or even figure out that icon's source. Also, the "Search Icons" box is cleared when I move between collections. No (obvious?) way to sort the collections by the number of icons.
This does not seem to be possible at the moment, whenever the icon is discovered through the search all icons feature. Or am I missing something?