Below you can find logos, similar to the 21st Century Design.

Nurlogic Design Nurlogic Design vector
Brilliant Design Brilliant Design vector
The Designers Republic The Designers Republic vector
Prodesign ApS Prodesign ApS vector
Daigle Design Daigle Design vector
Designer's Collection Designer's Collection vector
Haigh Thornley Design Haigh Thornley Design vector
Renders Graphic Design Renders Graphic Design vector
win95 design win95 design vector
Cerny Design Cerny Design vector
Trek Design Trek Design vector
The 11 Metre One Design The 11 Metre One Design vector
P&G Design Group P&G Design Group vector
ADR Design ADR Design vector
Database Design Solutions Database Design Solutions vector