You could have downloaded NisEdit 2.0 from our software library for free. This free program is a product of Nullsoft Scriptable. The program lies within Education Tools, more precisely Languages. The following version: 2.0 was the most frequently downloaded one by the program users.
From the developer:
HM NIS Edit is the best Editor/IDE for Nullsoft Scriptable Install System (NSIS). Its useful for experts and beginners in the creation of Setup programs with the NSIS. Its Script Wizard will help you to create standard Setup programs with only few clicks, also its InstallOptions designer will help you to create your own custom pages with a friendly drag and drop interface.
You may want to check out more software, such as HM NIS Edit, which might be similar to NisEdit.