VTM is the site that originally hosted downloads of LemEdit. (It calls itself a company, whatever that really means.) It also hosts LemEdit levelsets that various people have made, such as Martin Zulinder (sorry for misspelled), Juanjo, etc. I think it even held a contest once for the best Lemedit levelset or something like that.
But it didn't last too long, and I forgot when, but eventually the site simply went dead and disappeared from the web. By the time I discovered LemEdit about 4-5 years ago, the site was already pretty inactive though still up. Now it's long gone.
It wasn't entirely clear to me whether the VTM site is directly managed by the person who wrote/created LemEdit and/or CustLemm.
The vote system was something the site setup for people to rate each other's levels or levelsets. (I don't really remember well because, as I said, by the time I discovered it, it was already pretty inactive.)
One thing that site really lacked was a discussion forum like this one. Then again, maybe back then web-based discussion forums just aren't widespread enough for most people to learn to set up. I think had there been a forum, the site would have a better chance of staying alive and up a little longer.