rmt135,
The problem with identifying tagless orchids is that unless they are certainly a species, or unless they are a popular, well-known, distinctive hybrid, an ID will pretty much be impossible. Hybrids demonstrate a great deal of variation, the more complex they hybrid, the greater the variation. So you could have orchids of 2 different parentages looking exactly the same or very similar.
So beyond saying "Cattleya" or "Vanda" more specific IDs won't be possible with one exception: the white and green flower found at:
http://www.orchidgeeks.com/gallery/d...p?imageid=2053. This flower could be the species Brassavola nodosa. Unfortunately it could also be the hybrid Brassavola Little Stars (nodosa x cordata). A picture isn't enough to sort it out. You'd probably have to get it looked at by a taxonomist.
I'm concerned by something I see in 2 of your cattleyas:
http://www.orchidgeeks.com/gallery/d...p?imageid=2041 http://www.orchidgeeks.com/gallery/d...p?imageid=2043
I see irregular colour breaks in the petals and sepals. In the first one you'll see it in the middle of the dorsal sepal and in the middle of the left lateral sepal (but not in the right). In the second one you'll see it in the dorsal sepal and the left petal of the flower on the left and in both petals and the right lateral sepeal of the flower on the right. These colour breaks are symptoms of virus. I strongly recommend getting rid of these plants as they will not be healthy plants, they will probably always bloom with these colour breaks and they can potentially infect the rest of your collection. Orchid viruses can not be treated or cured. The only remedy is to destroy the plants. I'm sorry to have to give you this bad news because they are pretty flowers.