1) Feather

Feather - Simply beautiful open source icons

https://s3-us-west-2.amazonaws.com/secure.notion-static.com/83dc361e-0571-41ca-ae03-675554a32834/untitled

2) Ikonate

Ikonate - fully customisable & accessible vector icons

https://s3-us-west-2.amazonaws.com/secure.notion-static.com/e025193a-4099-48b4-8712-722f738796d0/untitled

3) Smashicons

Smashicons

https://s3-us-west-2.amazonaws.com/secure.notion-static.com/1e9af232-862c-4f99-9841-8647f609632c/untitled

4) Material Design Icons

Material Design Icons

https://s3-us-west-2.amazonaws.com/secure.notion-static.com/585454d4-eb84-4fdf-9275-40dead226312/untitled