Here are 20 well designed and highly detailed business icon sets that is sure to set you apart from your competitors.
Eldorado

Flat icons

Icon Pack: 256×256 Business Icons

Commercio Free

Media & Marketing Icons Set

Flat Icon – Leisure Series

Online shopping Medical Communication Icon

80 Black Hotel And Vacation Icons

Modern SEO Services Icons

130 Simple Icons • FOOD & DRINKS •

45 Medical icons

50 Model Seo Icon

Food & Beverages Icon Pack

20 Steel Construction Icons

Ultima SEO Services Icons

Map Icons and Elements – River and Road Kit

110 Hand-drawn Business and Office Icons

70 Food and Drink Icons

Business and Office

Modern Business Icon Set

Goldmine! as usual 🙂