Nautyyy, my reimplementation of Brendan McKay's Nauty, a programm for graph isomorphism testing, with an underlying Partition data structure similar to the one used in Bliss.
For reference see:
McKay, Brendan D. and Adolfo Piperno. “Practical graph isomorphism, II.” J. Symb. Comput. 60 (2013): 94-112.
And
Junttila, Tommi A. and Petteri Kaski. “Engineering an Efficient Canonical Labeling Tool for Large and Sparse Graphs.” ALENEX (2007).
For usage, run Nautyyy.exe -h