Algol60 Compiler Source from Edinburgh University - Compiler written in 1976, in closely related language Imp, from Edinburgh University. - http://history.dcs.ed.ac.uk/archive/os/emas/emas2/compilers/algol/
ALGOL - Growing article, with links to many related topics. [Wikipedia] - http://en.wikipedia.org/wiki/ALGOL
Eli specification of ALGOL 60 - from which an analyzer for ALGOL 60 can be generated. - http://citeseer.ist.psu.edu/396935.html
NUMAL - A library of ALGOL 60 procedures in Numerical Mathematics. - http://homepages.cwi.nl/~jankok/etc/Preamble.html
ALGOL 60 Phrase Structure - An Eli specification from which an analyzer for Algol 60 can be generated, or which can be used as one component of as complete ALGOL 60 compiler. - http://ag-kastens.upb.de/eli/examples/eli_a60E.html
Algol60 - Some sample programs in Algol 60. - http://www.csse.monash.edu.au/~lloyd/tildeProgLang/Algol60/
FOOGOL - A toy compiler for a subset of Algol-60. - http://www.idiom.com/free-compilers/LANG/FOOGOL-1.html
The ALGOL Programming Language - History, significant language features, areas of application, sample programs. - http://www.engin.umd.umich.edu/CIS/course.des/cis400/algol/algol.html
MARST - The package is intended to translate Algol 60 programs to the C programming language. - http://www.gnu.org/software/marst/