- City of Mentor, Ohio
- Miami Beach Gov
- City of Minden
- City of Moreno Valley
- City of North Plains
- City of Novi
- City of Otsego
- City of Peterborough Waste
- City of Princeton
- City of Redding Solid Waste
- City of Sanibel Traffic Cams
- City of Scappoose Oregon
- City of Southside AL
- City of St Albert: BeWasteWise
- City of Thornton - Thornton 8
- City of Thornton Recycles
- City of Vero Beach STEP System
- City of Westminster, CA
- City of Winters
- City of Yucaipa
- City Quiz Germany
- City to City: Travel guides for trip planning
- City View Charter School
- City Vote
- City Year, Inc
- CityBase
- Cityfy
- Vila Franca de Xira 365
- CityGuards
- CITYPEAK CAMPERS
- Citytouch
- Ciudadania Americana 2022
- Ciudadania USA
- CivEd
- CIVIC
- Civics 101
- CivicsTest
- Civil Eng Open Channel Flow
- Civil Engineering Formulas
- Civil Engineering Magazine
- Civil Engineering Review
- Civil Engr Dict. (Jpn-Eng)
- Civil Engr. Dict. (Chin-Eng)
- Civil Service Exam Prep
- Civil War in Color
- Civil War Battles
- Civile
- Civilization Drafter
- Civilopedia
- Civita di Bagnoregio
- Civvy
- Ciência 2021
- CJ configurator
- CJ Lookup 倉頡找字快
- CJER
- CJKI Chinese-English Dict.
- CJKI Japanese-Spanish Dict.
- CJKI Vietnamese-Japanese Dict.
- CJKV Dict
- CKAD Kubernetes Exam
- CLABER Irrigare bene
- Clan Inspector
- Clarendon County SC EMS
- Claret Contigo
- Clarinet, Saxaphone & Bassoon
- Clarington Public Library
- CLARITY Financial Planners
- Clark Lottery
- Clarke County EMA, AL
- Clarkstown Teachers
- Clarksville Christian School
- Clarksville Oil
- Claro Monitoreo
- Clash of Stats
- Clasp
- CLASS iCatalog
- Classic Arms and Militaria
- Classic Bike Hub
- Classic City Conference
- Classic Compressor Course
- Classic Compressors Course
- Classic Hymnal
- Classic Sky Map 2
- Classic Talent Calculator
- Classical Lines 98
- Classical Root Dictionary
- Classical roots and words