DLL Manufacturers
- wxWidgets development team
- Wyse
- X Dimension Software
- X-Rite
- x264 project
- Xara Ltd.
- Xaudio Corporation
- Xceed Software Inc.
- Xerox
- XESystems, Inc.
- XGI Technology, Inc.
- Xing Labs
- Xing Technology
- xiph
- Xircom
- XLGames Corporation
- XnView
- XSS
- XtreamLok
- Y.Kimura
- Yahoo Inc.
- YAMAHA Corporation
- Yandex
- Yoshinari Kimura
- Young Digital Poland
- Zavyalov Alexey Alexandrovich
- Zeal SoftStudio
- Zemana Ltd.
- Zenographics
- Zittware
- Zone Labs Inc.
- ZONER software
- Zoran Corp.
- zplane.development
- Zulea Soft
- Zwick GmbH & Co.