DDE-BIFTOOL
Bifurcation analysis for delay-differential equations
... at KU Leuven [1] stores versions up to 3.0 and their documentation.
[1] <http://twr.cs.kuleuven.be/research/software/delay/ddebiftool.shtml>
[2] <https://www.gnu.org/software/octave>
Further tutorials (by M Bosschaert) at <https://sites.google.com/a/uhasselt.be/maikel-bosschaert/home> (pdf files).