I'm using Streamline on my current project ( http://www.streamlineicons.com/ ), and I'd recommend it over Iconic if you're looking for a commercial-grade icon solution - it's more expensive, but well worth it. 2 sizes, separate resources for filled vs outlined which are well thought out and involve more than just "filling in" the outline version. No SVG, but various vector formats which can easily be exported to SVG via batch tools. And they seem to really be into supporting and extending their product, every update has been free and I've been notified in a non-spammy way.
...and no, I'm not affiliated, I've just had a very pleasant experience working with their stuff, IMO for a commercial product it's well worth the investment.
Streamline appears to be significantly cheaper if you're going to properly follow the license terms of 1 project/license that Iconic lays out. Though as I look at streamline's license terms they too seem kinda restrictive: I can't use more than 100 icons/project, not that I would (how many icons can a single app have after all) it's just such a strange constraint.
Just wondering, how do they know if you're using more than the requisite number of icons, or if (in Iconic's case) you use them for more than one project on a single license? I doubt Iconic (which from what I understand is just a three person company) has the resources or time to chase after these types of violations. Not to mention the original kickstarter had no such restrictions. So all they're doing is making theoretical criminals out of poor designers, or worse: loosing potential customers who can't afford to buy a new license for each project. In stream line's case it's even more bizarre; are they really going to go around counting the number of icons you use in your project? How do they even track if you're using a single icon?
Actually, the only Kickstarter backers who get an unlimited licence are those who pledged over $1000. The others get that standard pro licence.
From the FAQ[0]:
I'm a Kickstarter backer, what license will I receive?
Thank you! You made this project possible. All Kickstarter backers that pledged $35 and above will receive a full Pro license. For their extra generous support, $1,000 backers will receive an Unlimited license.
...and no, I'm not affiliated, I've just had a very pleasant experience working with their stuff, IMO for a commercial product it's well worth the investment.