There are a few websites that offer some free software related to the food industry's Hazard Analysis and Critical Control Points, or HACCP, such as HACCP Wizard 2.0. HACCP Wizard can create HACCP documents. However, there is seemingly very little or no other software available for free online.
The HACCP is a process control system, the purpose of which is to identify at what point in the production of food might hazards be introduced and then to put actions into place that are capable of preventing such things from happening in the future. The HAACP system is based in science and is a systematic process that follows a pattern to discover new issues that must be worked through.