Shares of Intraware ( ITRA) were among technology's winners Tuesday, climbing 15% after Digital River ( DRIV) bought a 14% stake in the software company.

Intraware said that Digital River paid $6 million for the stake. "The investment is the first step in what the companies plan will be a broader strategic relationship, including integrated service offerings and the nomination of a designee of Digital River to Intraware's board of directors," Intraware said in a statement. Digital River bought a new class of preferred stock, which is convertible into one million common shares. Intraware plans to use proceeds from the investment for general corporate purposes. Shares of Intraware recently were trading up 65 cents to $5.05. Digital River shares gained 42 cents, or 1.7%, to $24.71.

Agilent Technologies ( A) rose 5% after the company posted fourth-quarter results that topped forecasts. The maker of test and measurement equipment earned $26 million, or 5 cents a share. Excluding items, the company would have earned $193 million, or 38 cents a share. Agilent posted sales of $1.41 billion, but if the company had included its semiconductor products business -- which it agreed to sell during the fourth quarter -- sales would have been $1.9 billion. Analysts polled by Thomson First Call expected earnings of 37 cents a share and sales of $1.85 billion. Last year's adjusted earnings were $153 million, or 30 cents a share, on sales of $1.82 billion, including sales from the semiconductor products business.

For the first quarter, Agilent sees earnings of 25 cents to 30 cents a share, in line with analysts' expectations of 28 cents a share.

Separately, Agilent laid out plans to buy up to $2.7 billion in stock through a modified "Dutch auction" tender offer. Agilent will buy up to 73 million shares at prices ranging from at least $32 a share to no more than $37 a share. The shares recently were up $1.71 to $34.61.

Shares of Amazon.com ( AMZN) rose 6% after Standard & Poor's said it plans to add the Internet retailer to its S&P 500 index after the close of trading on Friday. Amazon will replace AT&T ( T), which is being acquired by SBC Communications ( SBC). Shares of Amazon rose $2.54 to $45.07.

Imation ( IMN) rose modestly after the company increased its full-year earnings and sales outlook. The company, which makes magnetic and optical data-storage products, sees fourth-quarter earnings of 44 cents to 48 cents a share on sales of $315 million to $330 million. Analysts expect earnings of 48 cents a share, with sales of $317.2 million. For the full year, Imation projects earnings of $2.28 to $2.32 a share, up from its previous guidance of $2.10 to $2.17 a share. The forecast includes a tax benefit of 35 cents a share. The company now sees sales growth of 5% to 6%, up from its earlier view of 3% to 5%. Shares were up 20 cents to $42.51.

Shares of Astea International ( ATEA) soared 40% after the software company posted sharp third-quarter earnings and sales gains. The company earned $2.7 million, or 91 cents a share, on sales of $8.2 million. A year earlier, Astea reported a smaller profit of $155,000, or 5 cents a share, on sales of $4 million. License revenue more than quadrupled to $4.8 million. "The third quarter was a very successful and eventful quarter for Astea. Not only did we continue to achieve strong financial and operational results, but we also completed the acquisition of FieldCentrix, a leading mobility solution provider," the company said. Shares were trading up $3.65 to $12.80.

Vimicro ( VIMC) shares tumbled on their first day of trading. The Chinese semiconductor company's initial public offering of 8.7 million American depositary shares priced at $10 a share, below the targeted $11 to $13 price range. The shares recently traded down $1.10, or 11%, to $8.90.

Other technology movers included Microsoft ( MSFT), up 17 cents to $27.44; Sirius Satellite Radio ( SIRI), up 19 cents to $7.17; JDSU ( JDSU), down 3 cents to $2.15; Cisco Systems ( CSCO), down 3 cents to $17.32; Advanced Micro Devices ( AMD), up $1.45 to $26.45; Intel ( INTC), down 5 cents to $25.32; Motorola ( MOT), down 28 cents to $22.58; UTStarcom ( UTSI), up $1.54 to $8.11; Dell ( DELL), up 32 cents to $29.78; Oracle ( ORCL), down 9 cents to $12.73; and Lucent Technologies ( LU), up 2 cents to $2.75.

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