Progiciel is a word derived from Produit (product) and logiciel.
It's a commercial software, ready-to-use and set to meet ordinary needs.
This term is opposed to the logiciel, made by companies in order to respond to more specific needs.
Here's nanoune's answer translated. If it helped you, thank her, not me :)
I can add that progiciel is a really really uncommon word in french language (I can even say that I learned it from today !)