What are some alternatives?
When comparing Font Awesome and IcoMoon, you can also consider the following products
Flaticon - A database of free vector icons.
Sketch - Professional digital design for Mac.
Google Fonts - Making the web more beautiful, fast, and open through great typography
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
IconPharm - IconPharm is a library of open source icons with recoloring and resizing tools.
Adobe Creative Cloud - Adobe Creative Cloud is a SaaS offering for graphic design, video editing, web development, photography, and cloud services.