From the blog:
Salesforce.com removed one free conferencing tool from the world when it acquired DimDim in January, leaving many startups without a free teleconferencing service.
Fortunately there are many excellent free options for coordinating remote meetings. “Free,” in this instance, means a service that doesn’t charge extra call rates or add service subscription fees on top of call fees. Aside from the well-known FreeConferenceCall.com, here are four of our favorite services in this category, listed below, ranging from impromptu team conversation tools to meeting organization powerhouses.