Originally Posted by boo boo

Porcupine Tree is one place to start. They're compared to Floyd quite often.

Eloy were quite similar to Floyd as well, especially with their later 70s albums. Camel also have a bit of Floyd influence.

I'd also recommend Gong and Ozric Tentacles, they don't sound like Floyd but they specialize in groovy psychedelic prog so if you like Floyd you might like them.

Here's some recommendations.

Porcupine Tree: Lightbulb Sun, In Absentia, Fear of a Blank Planet
Eloy: Ocean, Silent Cries and Mighty Echoes
Camel: Mirage, Snow Goose, Moonmadness
Gong: Flying Teapot, Angel's Egg, You
Ozric Tentacles: Erpland, Strangeitude, Jurassic Shift

Originally Posted by Neapolitan

Since the question is address to Boo Boo, I let him recommend the Prog bands. And in a way I feel guilty talking about other bands in a Pink Floyd thread, but here are my recommendations

The Church, they are influence by Pink Floyd and some songs have a Pink Floyd sound.

Genesis, after Peter Gabriel left Phil lead them into a more soft rock sound, Follow You Follow Me was kinda of a break through song into the soft rock even though they had some before that.

Alan Parsons Project, today I was listening to Shine On You Crazy Diamond and thinking how the one part sounded like APP song. I kinda thought that I Robot had a Pink Floyd sound