• GNU Make
• gtkwave (to see simulation results)
• yosys
• ghdl (gcc or llvm backends, mcode won't work)
• ghdl-yosys-plugin
• nextpnr
• icestorm

Is recommended to install yosys, ghdl, ghdl-yosys-plugin, nextpnr icestorm from source since most distributions don't include those in their main repositories or include outdated versions that might not work with the provided Makefiles.