Essential FTIR 3.5.157 is available as a free download on our software library. The actual developer of the software is Operant LLC. The software is included in Education Tools.
From the developer:
Essential FTIR is a program for the presentation of infrared data.
You may want to check out more software, such as Essential Data Tools, Microsoft Security Essentials or Essentials Of Fire Fighting Study Helper, which might be related to Essential FTIR.