- Orio Eragin Eskubaloi Kluba
- Oriya Keyboard & Translator
- OriyaMatrimony - Marriage App
- Orlando Church of Christ
- Oromoon: Cosmic Intelligence
- Oros Health
- Orsegups - Meu Condomínio
- Orthodox Calendar
- Ortholoop
- Orthotown
- Osaka People 01
- Osaka People 02
- OSANA
- Oscar Enterprise
- Oscar Family
- Osem - Leading Revision App
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