**Exhibit 31.1 Certifications**

I, Robert C. Shreve, Jr., certify that:

|   | 1.     | I have reviewed this annual report on Form 10-KSB of   Avatar Systems, Inc.;                                                                                                                                                                                                                                                     |
|--------|--------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   | 2.     | Based on my knowledge, this annual report does not   contain any untrue statement of a material fact or omit to state a material   fact necessary to make the statements made, in light of the circumstances   under which such statements were made, not misleading with respect to the   period covered by this annual report; |
|   | 3.     | Based on my knowledge, the financial statements, and   other financial information included in this annual report, fairly present in   all material respects the financial condition, results of operations and cash   flows of the registrant as of, and for, the periods presented in this annual   report;                    |
|   | 4.     | I am responsible for establishing and maintaining   disclosure controls and procedures (as defined in Exchange Act Rule 13a-14   and 15 (e)) for the registrant and I have:                                                                                                                                                      |
|   |   | a)                                                                                                                                                                                                                                                                                                                               | designed such disclosure controls and procedures to   ensure that material information relating to the registrant is made known to   me by others within those entities, particularly during the period in which   this annual report was prepared; |
|   |   | b)                                                                                                                                                                                                                                                                                                                               | evaluated the effectiveness of the registrant’s   disclosure controls and procedures as of December 31, 2005 and in this annual   period presented in this report (“Evaluation Date”); and |
|   |   | c)                                                                                                                                                                                                                                                                                                                               | presented in this annual report my conclusions about   the effectiveness of the disclosure controls and procedures based on the   required evaluation as of the Evaluation Date; |
|   | 5.     | I have disclosed, based on my most recent   evaluation, to the registrant’s independent registered public accounting   firm  and the audit committee of   registrant’s board of directors (or persons performing the equivalent   function):                                                                      |
|   |   | a)                                                                                                                                                                                                                                                                                                                               | all significant deficiencies and material weaknesses   in the design or operation of internal controls which could adversely affect   the registrant’s ability to record, process, summarize and report financial   information; and |
|   |   | b)                                                                                                                                                                                                                                                                                                                               | any fraud, whether or not material, that involves   management or other employees who have a significant role in the registrant’s   internal control over financial reporting. |

Date:     March 30, 2006

|   | /s/  Robert   C. Shreve, Jr.                   |
|--------|-----------------------------------------------------|
|   |                                                     |
|   | Chief Executive Officer and Chief Financial Officer |
|   | (principal executive and accounting officer)        |