Here are some ACS example circuits. Some of these will also run on Spice and can be used for comparison.
You can run them in batch mode by typing "acs -b name" from the shell. You can run them interactively by starting acs then "get name". Then play, change probes, rerun, change values, etc.
The file "runall" is a script so you can automate the testing. Read it before using it.
"runall.out" is the result of running "runall". Ideally, you should get identical results, but there are often small differences in the machine math functions that will give small differences in the results. Any numerically significant difference represents a serious bug and should be addressed.