You can now display SVG icon without installing icon font, IconSVG offers customisable and clean-up SVG icons. Icon size and weight and even curve or straight ends are available as an option. However, the icon library is a bit short for start (around 150 icons).
Explore related resources
Spotify Icon System Update
Collaborated with icongrapher Rob Bartlett, Spotify design shipped updated icon library from 1px to 2px width and unified size variants from 5 to 2.
Logobook collects a variety of logos for design inspiration. Categorizing in letters, numbers, shapes and even business nature. Logobook is a great reference to kickstart the brainstorming process.
The Noun Project
Royalty free icons that can be used anywhere in your workflow, including Mac, Office, Adobe Createive Suite and Google Doc.