RISAConnection has a trial version that does both AISC and CISC. However, it is specifically designed to not be quite so useful for real projects. How so? It's essentially the full program, but with "goofy" materials for steel members, bolts, plates and such.
You'll see all the calculations, but with an Fy for members of something like 25 ksi or such. Similar thing with bolts and welds. Like I said, it's not great for real projects. But, it might be a useful starting point.
That being said, I might prefer for most simple connections to look at AISC manuals and website. They've got lots of standard connections tabulated. Even the ones that aren't tabulated will likely have a pretty good example problem you can copy and customize for your project.