Sigasi Starter Edition: Forever Free
The Sigasi Starter Edition has two modes:
If the total size of your VHDL files is small enough (i.e. less than 32 kB), all features from Sigasi Pro will be available.
For larger projects, the Starter Edition will work in Baseline Mode. In Baseline Mode, some VHDL features are disabled. You can find the full list of features in the Sigasi Pro feature Matrix. While you will surely miss these features, Sigasi Baseline remains an unrivaled powerful VHDL editor.
How large is my design?
You can easily track the size of your HDL projects with the codometer. If your workspace is small, the codometer is green. If you get close to the limit it turns yellow. If your workspace contains more than 32 kB it turns red and the advanced feature are disabled.