- O BENFICA (Publicação Oficial)
- O Globo
- OAB Verbo
- Oakdale Leader
- OBJEKT South African Edition
- OC App
- Octane Magazine
- Odda Magazine
- Offenbach-Post E-Paper
- OGGI - Digital Edition
- Oggi Cucino - Digital Edition
- Oh-No! Manga
- OK! Magazine
- OK! Thailand
- OKIDO
- Oklahoma Today
- Old Bike Australasia
- Old Bike Mart
- Old Glory Magazine
- Old House Journal
- Oldtimer-Termine
- Oleodinamica Pneumatica
- Olivo e Olio
- Oltner Tagblatt E-Paper
- OM Yoga Magazine
- Oman Economic Review
- OMTimes Magazine
- ON Magazine
- On the Couch Magazine
- Onetz
- Online Business Smart Guide
- Onlit: Livre & eBook Reader
- OnOffice
- Open Magazine India
- Open Qiita
- Open Source For You
- OPER!
- Opera Magazine
- Opera Now
- Opernwelt
- Optician Magazine
- Orbyt for iPad
- Optician Magazine
- Orbyt for iPad
- Organi di Trasmissione
- Organic Farming Magazine
- Organic Gardener Magazine
- OrganisationsEntwicklung
- Organists' Review Magazine
- Orthopedic Design & Technology
- Ortopedici e Sanitari
- Osotho
- Otaku USA Magazine
- OTHER magazine
- Ottawa Citizen
- Ottawa Citizen ePaper
- Ottawa Sun
- Ottawa Sun ePaper
- Ouest-France – Le journal
- Ouest-France, l'info en direct
- Our Canada
- OUT Magazine