
Namely the line of sight stuff, to be able to see what is visible from a character or NPC's perspective.

You can use Roll20 for free, but you lose some of the features that are included in d20Pro. It's the VTT our group uses and works fine.

It isn't free, but if you've already paid for it, then it costs you nothing to use. If you already have d20Pro, I'd stick with that. And MapTool will likely be one of the first, if not THE first, to have some level of integration. So we don't have something in place yet, but we're working on it. That's based on his comments in one of the other threads where this subject was discussed. I do know that a long-time contributor to the aforementioned MapTools has expressed an eagerness to get the data from us and is anxiously waiting for the ability to integrate with that tool. I'm sure that will vary depending on the VTT and an assortment of factors. I'm not sure how much work is involved on the VTT side. We do NOT yet have something available, but we expect to have our end of it ready in the weeks ahead (not months, but weeks). I have openly stated in various threads here that integration with VTTs is something very high on our priority list right now. Alas, that was probably self-evident from the tone s/he used.

As has been established in other threads, doesn't agree with the path we've chosen for HLO, so s/he chose to be rather disingenuous in the post above.
