- Delta
- Damansalva
- Diegeo
- Dunn's Leathergoods
- Dofeli
- Dutchman's Store
- Dashboards.io
- Datanamo
- Divinity Original Sin
- Dungeon Hunter
- Dark Legends
- DKOnline
- Defend The Night
- Dragon Eternity
- Dumper
- DOK
- Develop It
- Data Boss
- DocBot
- Doc-Series
- DocUnity
- Docuvantage
- DriveAxle
- Dokuflex
- Dualtone
- Delved In Dreams
- DL Media Music
- Doghouse Records
- Delmark Records
- Dionecsa
- Dqlite
- Deskcenter
- Data ID
- DRES System
- DriveCo
- Doodles Academy
- Digital Project
- DJ VYBZ
- Data Rover EP
- DeviceLock
- Destineer
- Digital Tribe Games
- Diamond Payroll Services
- DaysToHappy
- Digital HRMS
- Doreming
- DVDs4Less
- Disc2Day
- DupeShop
- Duplication Centre
- Digital Express Mastering
- DiscRepublic
- DVD Audio Extractor
- DiskCopy
- DiscMasters
- DiscBurn
- DraftOps
- Draft Punk
- Daily Fantasy Lines
- David and Charles
- Da Capo Press
- DevContact
- DiamanteDesk
- DataKnowl
- Dream Learners
- Digiseq
- Darwin Pricing
- DateMatch
- Dating4disabled
- DesiKiss
- Dating From Home
- Dickens
- Dr. Sam Robbins
- DOCOVA
- Duet
- Devtendo
- DivShow
- Draw Anywhere
- Dale Technology Co.
- Destiny Career Planners