Here are a ton of free linear icon vectors that you can use for business ...
Vector4Free.com is a web site dedicated to free vector graphics: Adobe Illustrator AI, EPS, PDF, SVG, Corel Draw CDR files free to download - that's what you can find here. To facilitate your work every free vector is classified by tags (such as line icon vectors). We hope that you find vector4free.com handy and friendly. Enjoy!