Chalk Art
Specialises in the design and creation of smudge resistant chalk menu boards and gifts using brightly colored chalk on blackboard.
http://www.chalkart.com.au

Klingler Educational Products Corporation
Klinger Educational Products Corp. is one of the leading supplier of quality scientific laboratory equipment and apparatus for physics education.
http://www.klingereducational.com/

Finding the Chalk Makers: The Foraminifera
Chalk makers
http://www.microscopy-uk.org.uk/mag/artjul98/bdforam1.html

Mastery Multimedia - Tutorials
Tutorials: Painting around a gradient, Chalk cloning, Pavement Chalk cloning, and Image Hose Nozzle downloads.
http://www.mastery.com.au/mm/mmtt.html

Respondus
Respondus develops testing and assessment tools for the leading e-learning systems, including Blackboard, ANGEL, Desire2Learn, eCollege and WebCT.
http://www.respondus.com/

New York Blackboard of N.J.,Inc.
We Manufacture School Quality Chalkboards, Markerboards, and Bulletin Boards, Chalkboard Paint.
http://nyblackboard.com/

Blackboard
A hybrid drawing and chat interface that lets you draw with the people you're chatting with. Requires Java.
http://www.artcontext.org/draw2/

Blackboard Inc.
Provider of products that enable universities, schools, and corporations to host their classes on the World Wide Web.
http://www.blackboard.com

Polyvision
Whiteboard photo converts blackboard or flipchart snapshots into perfectly clear documents with any digital camera.
http://www.pixid.com

Blackboard
an online education company transforming the Internet into a dynamic web-based teaching and learning environment for colleges, universities and organizations through course delivery.
http://www.blackboard.com/