- Sign Studio
- Antenna Signal
- Signal Flags
- Signal Flags Communicator
- Signal Flags Info
- Signal Flags International
- SignalAir
- SignalFlags Tool
- Signalisation Routière – Quiz
- SignalLearning
- ICS Academy: Nautical signals
- SignBank
- Signing Master Class
- Signing Savvy Member App
- Signs and Cues
- SigrasApp
- SII
- SIKA MiljöAppen
- Sikh Hukamnama : Daily Mukhwak, Nitnem, Live Kirtan, Guru Granth Sahib, Katha
- Sikh Pro : Hukamnama, Nitnem
- Sikh World
- Sikh World - Nitnem & Gurbani
- Sikhipedia
- Sikhipedia
- SikhiToTheMax
- SikhNet Daily Hukamnama
- SikhNet Stories
- Sikka App
- SikkerHverdag
- SilageSnap
- Sille
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- Silver Screen (Classic Movies)
- SilverCloud
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- Silvianna for Anilist
- Simcoe County Collects
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- Simple Cards: Training Tool
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- Simple English Bible - offline
- Simple Factors
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- Simple Paper Model-Hobby Craft
- Simple percentage PERCENT
- Simple Quran
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- Simple Siddur
- Simple Songwriter
- Simple Songwriter LE
- Simple Tables: 0-12 Flashcards
- Simple Thai Dictionary
- Weather ´
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- SimpleLink™ Wi-Fi® Starter Pro
- SimpleMe
- Simplified For Microsoft Excel