- O Terço AR
- O&D - طبلة وعود
- O&D lite طبلة وعود
- O-GENERATOR
- OA Etziken
- Oacts Wor
- OAE Crew
- Oasis 102.5FM
- OASIS 1210 AM
- Oasis Church - Nashville
- Oasis FM Tenerife
- Oasis Radio Network
- Oasis Spirituelle
- OB-Xd AUv3 Synth
- ObeObeKo 謳歌
- Običan Radio
- Oblique Strategies SE
- Oboe Fingering & Tuning
- "埙"
- Ocarina Amaya
- Ocarina Blue
- Ocarina Blue
- Ocarina Tabs
- Ocarina with Songs
- Ocean 104.7 - WOCN
- Ocean Radio Chilled
- Ocean Wave Sounds for Sleep
- Ocean Wave Sounds — Premium
- Oceanic Prog Coloring DX
- OceanKTV Client
- Ocen Sounds
- OCPlay
- OCTACHRON MIDI Drum Sequencer
- OCTANE Mobile - AUV3
- Octave RTA
- Octavian
- October - Chiptune Maker
- Octomonk
- Octus Cast
- Océane
- Odd Metronome
- OddTunes:Hang
- Odesi - Smart Music Production
- Odesi Chords - Create Rhythms, Basslines, Chord Progressions
- ODESZA
- Odio – AR Soundscapes
- ODS Radio
- Off Leash K9 Training
- Official akwasi Awuah app
- Official Summerfest 2024 App
- Official髭男dism
- Offle - MP3 & MP4 Repeat Play
- Offline Music Player Pro
- Offline Music & Video Player
- Offline Music Mp3: TuMusic
- 离线音乐播放器 Offline Music Player
- My Rhythm 播放器: 卡拉OK,唱歌,听高品质音乐
- Offline Music Player *
- Offline Music Player Lite
- Offline Music Player Tones
- Offline Music Player-MusicMate