I've been using Fort Awesome for 6 months and I'd highly recommend them. For $50/year it's a steal. My favorite workflow is grabbing an svg icon from Noun Proj

I've been using Fort Awesome for 6 months and I'd highly recommend them. For $50/year it's a steal. My favorite workflow is grabbing an svg icon from Noun Project, modifying it in Illustrator until it suits my needs, copying it (Cmd + C), and pasting it directly into the Fort Awesome import box. This has all the benefits of generating svgs on your own with very little downside. It's saved me a lot of time and it makes turning an app design into a finished product a much faster process.