A Programming Language for Communicating Distributed Objects
   Fascinating proposal for a very compact folding CDO language: Seentacks? We don't need no stinkin' Seentacks!
   http://www.cawley.demon.co.uk/lang.html

Anvil
   Dynamically compiled, object-oriented language and environment, especially suited for web applications.
   http://njet.org/

Avail
   Multiply-polymorphic modular language with highly flexible syntax. Unique inheritance model allows multiple inheritance and polymorphism, constrained genericity, covariant attributes via immutability. Due to identityless nature of types, a type can have a
   http://www.ericsworld.com/Mark/HTML/Avail.html

Class (Computer Science)
   Growing article, with links to many related topics. [Wikipedia]
   http://en.wikipedia.org/wiki/Class_%28computer_science%29

CodeSimian
   Interpreted, with 1 type (all is data) only, made with Java; can be used as strings of its own code or as Java objects, code (even 1-line program) can write or modify other code; main purpose: write artificial intelligences that modify (parts of) themselv
   http://www.codesimian.com/

Dynace
   Object-oriented extension to C language. Solves many of the problems associated with C++.
   http://algorithms.us/

Indus Platform Developer Site
   New object-oriented, general purpose language for ubiquitous, autonomic, adaptive computing. Compiler converts source to Java bytecode, runs on extant Java run time environments. Java can compile to C, and cross compile to many targets, deploy across 8/16
   https://developer.aumeganetworks.com/

JellyJ
   Project to create object-oriented language that is easy to learn for beginners.
   http://jellyj.sourceforge.net/

Kapsel
   Experimental object-oriented language. Looks and feels much like original Smalltalk, adds features to specify access to object detail.
   http://tools.fiu.edu/

Lava
   Experimental, innovative, object-oriented, interpreted language, and programming environment LavaPE; edits programs via syntax-sensitive point-and-click style structure editors, not text editors; parameterized (virtual) types, refactoring, extensive stati
   http://lavape.sourceforge.net/

Nice
   OO language based on, integrated with, Java (compiler emits Java bytecode); features of functional programming, implements state-of-art results from academic research, for more expressivity, modularity, safety. [Open source, GPL]
   http://nice.sourceforge.net/

Noobeed
   Interactive geomatic object-oriented language for spatial modeling, image processing, remote sensing, digital photogrammetry, geographic information system (GIS), geodesy, and surveying and mapping.
   http://noobeed.com/

O'small
   Concise, simple OO language for teaching; and study of semantics of inheritance, and OO languages in denotational style, later became subject of research on type inference systems and abstract machines. [Open Source]
   http://www.ahense.de/osmall.htm

Qu
   Full-featured, semi-dynamic object-oriented language. [Open source, GPL]
   http://centrin.net.id/~marc/

Superx++
   Compiled object-oriented language fully based on XML syntax; conforms to XML version 1.0 specification as published by W3C. Descriptions, documents, FAQ, downloads, links. [Open Source, LGPL]
   http://xplusplus.sourceforge.net/

UnrealScript Language Reference
   High level, simple, Java-style, object-oriented, compile time error checking; native support for major concepts of time, state, properties, networking, which few languages address, to greatly simplify code. Mainly for games.
   http://unreal.epicgames.com/UnrealScript.htm

VIRT Laboratory
   Makes paxScript: general purpose, imperative, object-oriented language, with new technology of dynamic data structure processing; lets one process dynamic data structures (lists, trees, more) effectively with no pointers. Ensures laconic and uniform notat
   http://www.paxscript.com/

bx
   Language with objects, interfaces, parameterized types, no inheritance, operator overloading, generators, static instantiation, compiled to C; descriptions, source code, examples, compiler.
   http://www.skrenta.com/bx/

merd
   Ruby-like expressiveness + static type checks, like Haskell. [Open Source, GPL]
   http://merd.sourceforge.net/

merd: SourceForge
   Practical OO language: Ruby-like expressiveness with Haskell-like static type checks. Coded in ML, runs on Linux. [Open Source, GPL]
   http://sourceforge.net/projects/merd/