| .ALX | BlackBerry | Settings Files | BlackBerry Application Loader XML File | Eclipse IDE for Java Developers | The Eclipse Foundation |
| .BSH | Open Source | Developer Files | BeanShell Script | Eclipse IDE for Java Developers | The Eclipse Foundation |
| .CLASS | Oracle Corporation | Developer Files | Java Class File | Eclipse IDE for Java Developers | The Eclipse Foundation |
| .CXX | Embarcadero Technologies | Developer Files | C++ Main Source Code File Format | Eclipse IDE for Java Developers | The Eclipse Foundation |
| .EXL | SysTools Solutions | Data Files | Export Lister File | Eclipse IDE for Java Developers | The Eclipse Foundation |
| .HISTORY | The Eclipse Foundation | Developer Files | Eclipse IDE Local History Data | Eclipse IDE for Java Developers | The Eclipse Foundation |
| .INDEX | The Eclipse Foundation | Data Files | Eclipse Help Index | Eclipse IDE for Java Developers | The Eclipse Foundation |
| .J | Oracle Corporation | Developer Files | Java Source File | Eclipse IDE for Java Developers | The Eclipse Foundation |
| .JAV | Oracle Corporation | Developer Files | Java Source Code | Eclipse IDE for Java Developers | The Eclipse Foundation |
| .JAVA | Oracle Corporation | Developer Files | Java Source Code | Eclipse IDE for Java Developers | The Eclipse Foundation |
| .JKS | Oracle Corporation | Encoded Files | Java Keystore File | Eclipse IDE for Java Developers | The Eclipse Foundation |
| .JSP | Oracle Corporation | Web Files | Java Server Page | Eclipse IDE for Java Developers | The Eclipse Foundation |
| .JSPF | Oracle Corporation | Developer Files | Java Server Page Fragment | Eclipse IDE for Java Developers | The Eclipse Foundation |
| .KEYSTORE | Oracle Corporation | Encoded Files | Java Keystore File | Eclipse IDE for Java Developers | The Eclipse Foundation |
| .KM3 | The Eclipse Foundation | Developer Files | Kernel MetaMetaModel File | Eclipse IDE for Java Developers | The Eclipse Foundation |
| .KS | Debian | System Files | Kickstart File | Eclipse IDE for Java Developers | The Eclipse Foundation |
| .LAUNCH | Rogue Wave | Settings Files | Zend Studio Debugger Configuration Data | Eclipse IDE for Java Developers | The Eclipse Foundation |
| .PROPERTIES | Mojang | Game Files | Minecraft Properties File | Eclipse IDE for Java Developers | The Eclipse Foundation |
| .TLD | The Eclipse Foundation | Developer Files | Tag Library Descriptor File | Eclipse IDE for Java Developers | The Eclipse Foundation |
| .UML | Visual Object Modelers | Developer Files | UML Data Object Model | Eclipse IDE for Java Developers | The Eclipse Foundation |
| .UMLCLASS | The Eclipse Foundation | Developer Files | UML Class Model | Eclipse IDE for Java Developers | The Eclipse Foundation |
| .XBD | Xerox | Data Files | DocuWorks Binder File | Eclipse IDE for Java Developers | The Eclipse Foundation |
| .XMI | Object Management Group (OMG) | Data Files | XML Metadata Interchange File | Eclipse IDE for Java Developers | The Eclipse Foundation |
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