Download of NisEdit 2.0 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. We recommend checking the downloaded files with any free antivirus. The most popular version among NisEdit users is 2.0. NisEdit lies within Education Tools, more precisely Languages. The actual developer of the free software is Nullsoft Scriptable.
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 ComputerScript, Audio FlashCards German or SlovoEd Compact Portuguese-Spanish, which might be similar to NisEdit.