- 
Add Graal JIT Compilation to Your JVM Language in 5 Steps, A Tutorial http://stefan-marr.de/2015/11/add-graal-jit-compilation-to-your-jvm-language-in-5-easy-steps-step-1/ 
- 
The SimpleLanguage, an example of using Truffle with great JavaDocs https://github.com/graalvm/simplelanguage 
- 
Truffle Tutorial, Christan Wimmer, PLDI 2016, 3h recording https://youtu.be/FJY96_6Y3a4 Slides 
- 
Series of blog posts on implementing a Lisp http://cesquivias.github.io/ 
- 
Truffle Tutorials, Presentations, Publications https://github.com/graalvm/truffle/blob/master/docs/Publications.md 
- 
Graal VM and Graal.JS on the Oracle Technology Network http://www.oracle.com/technetwork/oracle-labs/program-languages/overview/index-2301583.html 
- 
Papers on Truffle http://ssw.jku.at/Research/Projects/JVM/Truffle.html 
- 
Papers on Graal http://ssw.jku.at/Research/Projects/JVM/Graal.html 
Maintained
- FastR, an R implementation: https://github.com/graalvm/fastr
- JRuby+Truffle: https://github.com/jruby/jruby/wiki/Truffle
- SOM Smalltalk: https://github.com/SOM-st/TruffleSOM
- SOMns, a Newspeak: https://github.com/smarr/SOMns
- SimpleLanguage: https://github.com/graalvm/simplelanguage
- Graal.JS, a JavaScript implementation: http://www.oracle.com/technetwork/oracle-labs/program-languages/overview/index-2301583.html
- TruffleC, a C on top of the JVM: http://dl.acm.org/citation.cfm?id=2647528
- Sulong, a LLVM IR implementation on top of the JVM https://github.com/graalvm/sulong
- TruffleSqueak, Squeak interpreter on top of Truffle https://github.com/timfel/trufflesqueak
Status Unknown:
- ZipPy, a Python 3: https://bitbucket.org/ssllab/zippy
Experiments
- 
Mumbler: A Lisp https://github.com/cesquivias/mumbler & http://cesquivias.github.io/ 
- 
Lua https://github.com/lucasallan/LuaTruffle & http://www.luatruffle.org/ 
- 
Hex https://bitbucket.org/hexafraction/truffles & https://hextruffle.wordpress.com/ 
- 
Golo (a minimal Truffle backend) https://github.com/smarr/golo-lang/tree/truffle 
- 
TruffleMATE, a Smalltalk with a completely reified runtime system https://github.com/charig/TruffleMATE 
- 
Mozart/Oz https://github.com/eregon/mozart-graal 
- 
DynSem: A Language Specification-Language, as a meta-interpreter in Truffle https://github.com/metaborg/dynsem 
- 
Cover: A Safe Subset of C++ https://github.com/gerard-/cover 
- 
TrufflePascal https://github.com/Aspect26/TrufflePascal/ 
- 
Reactive Ruby: Truffle Ruby meets Reactive Programming https://github.com/guidosalva/ReactiveRubyTruffle 
- 
The Truffle paper: “Self-Optimizing AST Interpreters” http://lafo.ssw.uni-linz.ac.at/papers/2012_DLS_SelfOptimizingASTInterpreters.pdf 
- 
How to represent Objects Efficiently: “An Object Storage Model for the Truffle Language Implementation Framework” http://chrisseaton.com/rubytruffle/pppj14-om/pppj14-om.pdf 
- 
The Truffle+Graal paper: "One VM to Rule Them All" http://lafo.ssw.uni-linz.ac.at/papers/2013_Onward_OneVMToRuleThemAll.pdf 
- One Compiler: Deoptimization to Optimized Code (work on SubstrateVM, AOT compilation of Truffle code) http://doi.org/10.1145/3033019.3033025
GraalSqueak should be in Maintained, maybe with the
gu install -u https://www.hpi.uni-potsdam.de/hirschfeld/artefacts/graalsqueak/graalsqueak-component-0.6.jarcommand as note