- SKW Digital Library
- Skybrary – Kids Books & Videos
- SL eBook
- Slaapkoppie
- Slambook App
- SLAMMED!
- Danish Slang Dictionary
- Bedtime Stories for Toddlers
- Sleepiest: Sleep Meditations
- Sleeping Beauty - iBigToy
- Sleeping Beauty - Interactive Fairy Tale iBigToy
- Sleeping Beauty - Kids story
- Sleeping Beauty Game Book
- Sleeping English(슬리핑 잉글리시:슬링)
- Sleeping Beauty Game Book
- Sleeping English(슬리핑 잉글리시:슬링)
- Sleeping Stones (Story)
- Sleeping Vampire Princess
- Sleepkin! - Сказки перед сном
- Sleepless - Spooky Stories
- Sleepy Stories
- SlideBook
- Slightly Foxed
- SLJ Group Of Instituitions
- Slovak Hungarian Dictionary
- Slovak−English dictionary
- Slovenian−English dictionary