Modelsim I would hate to rewrite it but I wish someone would. It has the worst and buggiest UI of anything I've ever used. Everything looks incredibly dated, a

Modelsim I would hate to rewrite it but I wish someone would. It has the worst and buggiest UI of anything I've ever used. Everything looks incredibly dated, and while the backend (the useful bit) does what it's supposed to (though very slowly unless you're paying for the big boy license) it's just a horrific place to be. Coming home from work and working on my own stuff with the tools I like rather than have to use is like a breath of fresh air. Vivado is also notoriously a bit of a bloated and buggy pig. For hardware simulation, Active HDL is probably the least worst thing that I've used that has all the features. But for just doing simple simulations without all the bells and whistles, GHDL is by far and away the best experience, and it's the free one. https://github.com/ghdl/ghdl https://github.com/ghdl/ghdl