A simple VHDL extension for visual studio. It's not perfect but it does the job.
Context aware syntax coloring
Functions/array signature help
Function result evaluation
Small functions code can be executed to evaluate the result, this allow to catch more errors.
Sensitivity list mistakes
You can report issues or make features requests at https://github.com/jobmarley/vhdl4vs/issues. This comes without guarantee but I try to help.