Images

Resources

Colors: Free to select

Styles: Five styles

Type: SVG, PNG

AttributionsRequired

Colors: B&W, pay to select

Style: Line doodle

AttributionsNot required

Colors: Select one color

Style: Flat and minimalist

BG: White

AttributionsNot required

Google Material Icons are available in five styles (outline, filled, rounded, sharp and two tone). They are available in black and white, and a range of sizes and densities. 

Select icon and background color, and background shape.

The Noun Project has a repository of many free vector icons that can be customized and used with no attribution.

Characters: Select 1-3

Type: SVG, PNG

Attributions:  Not required

Vecteezy is an online marketplace where users can license stock photos, vector graphics, and stock footage from artists. Basic features are free but include ads and limitations. Pro subscribers get advanced licensing and a more comprehensive selection of content.