My guesses :
1 - A
2 - D
3 - D
4 - D ?
5 - A
6 - D ?
7 - A
8 - D ?
Now to really stick my neck out
(Revised this list after stick on main monitors)
1 a Drom?
2/3 Virus - different filter models 2-D, 3-A
4 - something odd - very wierd filter on it, more like a wave morph - V-Synth maybe?
6 - Novation
8 - Old virus maybe?
5/7 - no idea something a bit older?