Altium Designer

http://www.altium.com/

Altium Designer is the world's first and only unified electronic product
development system that allows engineers to take a design from concept to
completion within a single application. Altium Designer brings together hardware,
software and programmable hardware development within a unified environment that
allows all aspects of an electronic product to be designed and managed within a
single system. This, combined with modern design data management capabilities
allows Altium Designer to transcend traditional tool boundaries, opening up new
design possibilities that allow more intelligent electronic products to be
created faster than ever before.