- Kaseya WorkBrowser
- KasKids. Habits and Rewards
- Kasra Avid
- Kassa
- KassaMobile
- Kastaco
- KastlePresence
- KastleResident
- KASTO VisualAssistance
- Kasu Trainer
- Kata Judge WKF by UKFPRO
- Katakana Exercise books
- Katakana practice book - large
- Katakana practice free
- Katakana Sensei
- Katari
- Kathak Studio
- Kathmandu ClockIt
- Kathrein ESU
- Katib كاتب
- Kaydoh
- Kayero
- Kaymbu
- KAYO
- KayWallet
- Kazakh keyboard - Kazakh Input Keyboard
- Kazakh Keyboard Qazaq Keyboard
- Kazakhsha Kirgizwshi 哈语输入法
- Kazanımlar - Yıllık Planlar
- KazKey - best Kazakh keyboard
- Kazoe
- KAZOEL
- KBB Trafik
- KBeacon
- KBL KBC Quiz
- KBM Cleaning
- KBox
- KBReader - amazing PDF reader
- KBSPresence
- KBZMS