Centra to Host eConference Highlighting Online Training Success Stories.

LEXINGTON, Mass. -- Centra Software, Inc. (NASDAQ: CTRA), a leading provider of software and services for online learning and training, today announced that it will host an eConference that will showcase breakthrough strategies and thought leadership in the field of eLearning and online training programs. "Winning Online Training Strategies" will take place September 20 - 21, 2005. Attendees will hear real-life case studies and research findings that illustrate how organizations have adopted winning strategies that deliver effective performance and learning outcomes. The latest in a series, this online event will also provide up-to-date information on how leading organizations have used technology to effectively drive employee performance toward business goals.

The lifelong learning movement with its emphasis on just-in-time learning has accelerated use of online training solutions. As this medium matures and learning professionals adapt to this environment, many organizations have created successful online education programs that augment traditional classroom learning. Centra's eConference will feature a series of interactive online presentations by leading research analysts and training executives, including Century 21, DaimlerChrysler, and the University of Missouri. In addition to breakout sessions, the eConference will feature two keynote presentations by a renown expert on enterprise-wide training, and an industry leading research analyst.

Lin Ballard, chief of Training for the Federal Prison Industries will kick off the program on September 20 with a keynote session, "Building an Enterprise-Wide Vision for Training," and will be followed by two afternoon tracks that focus on specific tactics and strategies for business and learning executives. Session topics include "Blended Learning Pays Off in Increased Sales at Century 21" and "ERP Rollouts, Blending the Rules at Australian Pharmaceutical Industries." On September 21, Cushing Anderson, Program Director for Learning Services at IDC, will present, "Examining the Link Between Strategic Business Planning and Training in the Extended Enterprise." Afternoon sessions include "How to Reach Your Customers the New Fashioned Way at DaimlerChrysler" and "Being Compliant with Your Compliance Programs at Raymond James Financial."

"One of the biggest challenges companies face is having the ability to create a continuous learning environment that is both cost effective and tied to strategic business initiatives," said Ellen Slaby, vice president of Marketing for Centra. "More and more organizations view eLearning as a critical component their core mission. Our goal of this eConference is to give participants strategic and tactical advice that can help them find creative ways to align their business strategy with their online learning programs."

Events Listing and Registration Information

"Winning Online Training Strategies " will take place on Tuesday, September 20 and Wednesday, September 21, 2005. To register and for a complete list of eConference sessions, visit http://www.centra.com/events/CMeConference.asp. There is no charge to attend and all sessions will be delivered directly to attendees' desktops using Centra's IP voice-enabled Web conferencing software solution. Participation requires a PC, Web browser, minimum network connection of 28.8 kbps, speakers and a microphone. For business professionals who are unable to attend, most sessions will be recorded and available for viewing at www.centra.com beginning on Tuesday, September 27, 2005.

About Centra

Online learning and training solutions from Centra create workforce efficiencies and enable organizations to share and exchange business-critical information with geographically distributed customers, partners, prospects and employees. Centra enables groups to work faster and more effectively by automating critical learning and training initiatives online through virtual classrooms, online meetings and Web conferences. From enterprise-application training and support to workforce development and more, Centra's software and services help organizations deliver critical information and skills to support their most challenging business initiatives. Currently available in nine languages, Centra solutions can be deployed as on-site software or through its ASP service. Organizations across every major industry and market sector choose Centra, including Wyndham International, Weyerhaeuser, Underwriters Laboratories, BMW and Stanford University. Headquartered in Lexington, Massachusetts, Centra serves a worldwide customer base throughout the Americas, Europe, Asia and Australia. For more information, visit www.centra.com.

Safe Harbor Statement Regarding Forward-Looking Statements

With the exception of the historical information contained in this release, the matters described herein contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, including but not limited to, statements about the beliefs and expectations of management regarding the Company's future performance, the Company's strategic initiatives, its ability to achieve and maintain a leadership position in real-time conferencing and collaboration, demand for the Company's software services and management's goals and objectives regarding future results of operations. These statements reflect management's beliefs and expectations as of the date of this statement, and involve risk and uncertainties that may cause actual results, events and performance to differ materially. These risk factors include, but are not limited to, risks associated with the Company's ability to successfully execute its strategic plan, the effect of the Company's cost-cutting measures on its operations, acceptance by customers of the Company's Enterprise Advantage Subscription pricing model, significant changes in our senior management team, customer fulfillment of the entire term of multi-year subscription contracts, uncertainty of market reaction to the Company's sales and marketing efforts, product demand for and market acceptance of the Centra 7 collaboration platform, the Company's ability to sell and deliver its Enterprise Application Rollout and Sales Effectiveness solutions and other future products, the effect of economic conditions generally on the market for IT spending and for the Company's products, the results of future research and development activities, the impact of competitive products and pricing, technological difficulties and/or other factors outside the control of the Company. There is no assurance that the Company will be able to implement its growth and operating plans as anticipated, or achieve its revenue and earnings goals. For a description of additional risks, and uncertainties, please refer to the Company's filings with the SEC, including its Annual Report on Form 10-K for the year ended December 31, 2004 and its Form 10-Q for the three months ended June 30, 2005, which are available at http://www.centra.com/investorrelations. Readers are cautioned not to place undue reliance on the forward-looking statements contained herein, which speak only as of the date hereof. The Company undertakes no obligation to release publicly the result of any revisions to these forward-looking statements that may be made to reflect events or circumstances after the date hereof or to reflect the occurrence of unanticipated events.

Centra is a registered trademark of Centra Software, Inc. All other trademarks referenced herein are the property of their respective owners.