One of them (at least) looks like it could be
Neoregelia 'Myerdorfii', as seen at this link:
http://www.bromsocnsw.org.au/images/...Myendorfii.jpg
It may be tough to pin down an ID on these Bromeliads. Another possibility is
Neoregelia fireball variegata & another still is
Neoregelia 'Martin'.