TKTSLogo
TKTSLogo is a "Traditional" Logo interpreter. The beginner will
want to start with controlling the turtle whereas the expert can work happily
without any graphics at all.
TKTSLogo has been written from scratch, starting in 2001. The interpreter compiles to an
internal P-Code and is designed with optimization and parallelism in mind.
Screen shots are from 1.0a7:


Currently still under early development, I appreciate any feedback and bug
reports.
There are many planned features in TKTSLogo that have not
been implemented yet. Look out for syntax color-coding, line-level breakpoints
and easier tracing.