Languages with bridges to the ObjC runtime:

• AppleScript: AppleScriptStudio is Apple’s Cocoa bridge for AppleScript
• C#: ** NObjective - the fastest .NET to Objective-C bridge [http://code.google.com/p/objcmapper/] ** Monobjc - A .NET/Objective-C bridge (C#, VB.NET, etc) [http://www.monobjc.net/] ** CocoaSharp - the Cocoa bridge for C# ** Dumbarton [http://www.imeem.com/developers.aspx]
• D: ** D/Objective-C Bridge [http://michelf.com/projects/d-objc-bridge/] ** Cocodao - D/Cocoa bridge [http://sourceforge.net/projects/cocodao/]
• Dylan: Gwydion Dylan has an Objective-C bridge
• Eiffel: EiffelCocoa - the Cocoa bridge for Eiffel
• Forth
• HaskellObjC - the Haskell/Objective-C bridge
• Io: The Io language has an Objective-C bridge [see http://www.iolanguage.com]
• Java: CocoaJava is Apple’s Cocoa bridge for Java (now deprecated; Apple says use JNI)
• JavaScript ** Apple’s JavaScriptCocoaBridge ** NodObjC - Bridge for NodeJS ** JsCocoa ** js-macosx (Mozilla only) [see http://code.google.com/p/js-macosx]
• Lisp: there are two Lisp implementations with Cocoa bridges ** LispWorks has an Objective-C interface ** OpenMCL has an Objective-C bridge
• Lua
• LuaObjCBridge - Lua/Objective-C bridge
• LuaCocoa - Spiritual successor to Lua/Objective-C bridge for Obj-C 2.0 using BridgeSupport [see http://playcontrol.net/opensource/LuaCocoa]
• Wax - An iPhone focused Lua/Objective-C bridge [see http://github.com/probablycorey/wax]
• TLC - A very compact bridge for use with luajit [see https://gist.github.com/2211379]
• OCaml: objective-c-caml-bridge - a ObjC / OCaml Bridge for Mac OS X [see http://code.google.com/p/objective-c-caml-bridge/]
• Perl: there are two Cocoa bridges for Perl ** CamelBones - a Perl/Objective-C bridge ** PerlObjCBridge - another Perl/Objective-C bridge
• Python: PyObjC - the Python/Objective-C bridge
• Ruby: RubyCocoa - the Ruby/Objective-C bridge
• Scheme: there are two Schemes with an Objective-C bridge ** Chicken-Scheme has an Objective-C bridge [see objc egg at http://3e8.org/zb/] ** Gauche has an Objective-C bridge
• Smalltalk: there are two Smalltalk implementations with Cocoa bridges ** AmbraiSmalltalk has a Cocoa bridge ** there is an Objective-C bridge for the MacOS X version of Squeak, see SmallTalk

for languages with native ObjC runtime support, see CocoaLanguages