for free conference call i’ve been using Free Conference Call. not bad for a free service. however, it is phone only. what if i want to share my screen? from this list, i found dimdim. dimdim is free for up to 20 people. plus, no need for additional software – u just need a web browser with flash and install a 2mb plugin. they also provide a dial-in number…but i guess i should stick with free conference call if i want to keep the same passcode for all conferences.
another service, drop.io, offers real time collaboration. at first sight, i just thought it was a file sharing service. it also gives a free voice conference line. with drop.io, u can also fax (pay) and receive faxes (free). cool!