development of Algol
played an important role in
establishing computer science as an academic discipline.
The Algol 68 Genie project preserves and promotes
out of educational as well as
scientific-historical interest, by making available
a recent checkout compiler-interpreter
written from scratch by
Marcel van der Veer, together with extensive documentation for both the language and this new implementation.
is a secure, expression-oriented programming language
with which you elegantly code algorithms without
having to bother too much about irrelevant technical details
and limitations inherent to many other languages.
Algol 68 was designed for programmers, not for compiler writers.
Algol 68 Genie is free software distributed under the
GNU General Public License
; it is a fast compiler-interpreter which ranks among the most
complete implementations of the language. Algol 68 Genie offers for example:
» numerous runtime checks facilitating debugging and improving the
reliability of your programs,
» native support for arbitrary precision arithmetic including
» syntactic constructions to support linear algebra,
» a gdb-style debugger and a pretty-printer to
beautify source code,
» optional linkage to GNU plotutils,
the GNU scientific library or PostgreSQL,
» extensions as UNIX pipes, regular expression matching,
and web page content fetching.
Current stable release and prebuilt binaries
released in January 2015
lets you build Algol 68 Genie on Linux, FreeBSD,
Mac OS X, Solaris or Cygwin from source code.
Detailed installation instructions are in the book
Learning Algol 68 Genie
For Microsoft Windows 7 or 8, an
algol68g-2.8 WIN32 executable
is available which is linked to GNU plotutils
and the GNU scientific library.
Unzip it and execute it from the Windows command line
This executable is compiled from the
Follow the links listed on the right of this page for prebuilt binaries.
An important repository is the
Algol 68 project
The distribution contains a test set to validate Algol 68 Genie.
The test set contains programs from Dick Grune's Revised
Mathematisch Centrum Algol 68 Test Set  and synthetic programs from the Rennes Test Set  which were automatically generated from the Algol 68 grammar using a formalism from Bernard Houssais (Université de Rennes). Especially the Rennes Test Set has proven very effective in exposing problems in Algol 68 implementations. The same combination of test sets was used to validate the well known
Other open source Algol 68 implementations
Next to Algol 68 Genie, one can obtain
which is a port by
of those parts of vintage
that were made available as ctrans
DRA Malvern's ELLA
A notable unpublished part is formatted transput.
Since ALGOL68RS was a one-pass compiler, algol68toc
on Algol 68.
The components of algol68toc
have multiple licenses that should be
it is open source software, but not all components are fully free.