I'm assuming you wish to play dvds when you say "read to .VOB files". So, try
smplayer or
kaffeine or
totem or
vlc or
gnome-mplayer or
kmplayer.
To burn iso images of dvds try
k3b or
gnomebaker or
nautilus-cd-burner. To create iso images of dvds try
k9copy. I'm not sure about reading iso images, but I think either
ark or
file-roller might work.
To find and try out packages, you can use either
synaptic (can search descriptions or names) or the online listings at
ubuntu.