Many Objectivists support "laissez-faire capitalism", but object to libertarianism. They think that libertarians are not philosophical enough to provide strong moral support for capitalism. These Objectivists are usually aligned with the Ayn Rand Institute (ARI).
I myself am a "reformed" or "neo-" Objectivist. I want Objectivists to be more open to libertarianism than they have been.
That is why I support a second organization, called the Objectivist Center. The Objectivist Center takes an "open" approach to Objectivism. David Kelley, the director, believes that Objectivism is an open system to which others beside Ayn Rand may contribute. In his view, Ayn Rand originated Objectivism, but she did not perfect it.
Leonard Peikoff, the founder of ARI, takes a more conservative approach to the philosophy. Thus ARI tends to stick to what Ayn Rand had to say about things.
Actually, I think both organizations do a good job in spreading Objectivism. There was a point in the past when I was contributing monetarily to both organizations simultaneously. I would still do so.
This is the Ayn Rand Institute. This is the organization most new Objectivists are familiar with.
This is the Objectivist Center.
If you've been an Objectivist for some time, but you've only been in contact with the Ayn Rand Institute so far, you may feel like the Objectivist Center is more your style.