EvoNexus, San Diego’s free high-tech incubator, announced that it has enrolled three more startup companies during ceremonies yesterday that officially marked the opening of its new facility.

CommNexus, the San Diego wireless industry group, announced five months ago that it was leading the creation of the free and “no strings attached” startup incubator, to be headed by wireless industry executive Cathy Pucher. EvoNexus, which is structured as a nonprofit organization, plans to eventually house 10 to 12 technology startups; it named its first three startups less than two months ago.

CommNexus and EvoNexus have both moved their offices into part of a 25,000-square-foot commercial office building that was previously occupied by San Diego-based Leap Wireless, (NASDAQ: LEAP), which sells prepaid discount mobile phone service through its Cricket Communications subsidiary. By providing the office space to EvoNexus for one year at no cost, Leap made the largest single contribution of more than thre