http://www.digikey.com/us/en/mkt/scheme-it.html
Scheme-it is an online schematic and diagramming tool that allows
anyone to design and share electronic circuit diagrams. The tool
includes a comprehensive electronic symbol library and an integrated
Digi-Key component catalog that allows for a wide range of circuit
designs. Additionally, a built-in bill of materials manager is
provided to keep track of parts used in a design. Once a schematic
drawing is complete, users can export it to an image file or share it
via email with others. Scheme-it works natively in all major web
browsers without requiring the use of any plugins. Only users
registered at
www.digikey.com are able to share and save designs.
Design electronics schematics and technical diagrams.
Utilize an integrated electronic symbol library and the Digi-Key
component catalog.
Keep track of parts used in each design with Digi-Key’s Bill of
Materials (BOM) Manager.
Share drawings with other engineers
via email and/or web link.
Export drawings to an image for personal use.