EXHIBIT 10.3

TO:
The Purchasers of Common Stock and Warrants of On2 Technologies, Inc.

To Whom It May Concern:

This letter will confirm my agreement to vote all shares of On2 Technologies,
Inc. (“ONT”) voting stock over which I have voting control in favor of any
resolution presented to the shareholders of ONT to approve the issuance, in the
aggregate, of more than 19.999% of the number of shares of common stock of ONT
outstanding on the date of closing pursuant to that certain Securities Purchase
Agreement, dated August 24, 2006, among ONT and the purchasers signatory thereto
(the “Purchase Agreement”) and the other agreements entered into in connection
therewith or as otherwise may be required by the applicable rules and
regulations of the American Stock Exchange(or any successor entity). This
agreement is given in consideration of, and as a condition to enter into such
Purchase Agreement and is not revocable by me.
 

        By:      

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Name of Shareholder:
Percentage Beneficial Ownership:

 
 
 

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