Freshmeat page: http://freshmeat.net/projects/slatesmalltalk/
This is "clean slate" Smalltalk, designed from the ground up to support many interesting and powerful ideas in a coherent way.
The specific features of the language are the support of both multi-method dispatch and prototype-based objects, and support for optional typing and syntactically-abstract macros.
The run-time architecture is novel in placing the binary compiler at a primary place within the system, and a virtual machine as a secondary part of the design.
It is also culturally related to Squeak in some ways.
License: MIT Public License
This project has the following developers:
New HTML Parser: The long-awaited libxml2 based HTML parser code is live. It needs further work but already handles most markup better than the original parser.
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If you're a C programmer with some spare time, take a look at the mod_virgule project page and help us with one of the tasks on the ToDo list!