Palo Alto, Calif.--Sun Microsystems announced Tuesday distribution of more than 1 million copies of StarOffice software in nine weeks of downloads, while Microsoft Corp. set the foundation for selling and distributing Office 2000 applications over the Internet. Sun, Palo Alto, Calif., said Internet distribution underscores the viability of its alternative office suite. Meanwhile, Microsoft announced Tuesday agreements with 16 different service providers to deliver Office 2000 applications available over the Internet. Microsoft, Redmond, Wash., said the companies will provide the core competencies for marketing, selling and distributing its Office 2000 application suite over the Internet, including monthly rentals of individual applications. Microsoft's initiative is to begin before year's end.