Most parts of the Hammer 3.0 code editor are licensed under the LGPL license. In other words, if you make changes/improvements then please donate the changes back to the community. The Scintilla DataFlex wrapper is licensed via the 2 clause BSD license (Scilexer.pkg and Scilexer.h) More free so that you do not have to worry about including it in any type of software be it commercial or not. If there's a need for the other parts to be licensed more freely then please contact one of the authors.