Recommended hostels in the Czech Republic

Český Krumlov:
Hostel 99
Traveller's Hostel

Prague:
Hostel Clown and Bard
Hostel Elf
Miss Sophie's
Old Prague Hostel
Sir Toby's
The Boathouse
The Czech Inn
The Traveller's Hostel
U Melounu Hostel
Prague Holiday Apartments
Hotels in Prague
Hotels, Flights, Sights and more for travel to visit Prague from the UK
Prague Hotels and Apartments

Busabout (a hop on hop off bus service all over Europe)

Germany:
Fat Tire Bike Tours, Berlin
Insider Walking Tours, Berlin
New Berlin Tours, Berlin
Mikes Bike Tours, Munich
Humboldt Tours Berlin The Circus Hostels, Berlin
The Clubhouse Hostel, Berlin
Odysee Hostel, Berlin
Hotels in Berlin

Austria:
Yoho Hostel, Saltzburg
Wombat's City hostel, Vienna

Hungary:
Absolute Walking Tours, Budapest
Station Guesthouse Hostel, Budapest
Yellow Submarine Club Hostel, Budapest