Gestix 4.8.74 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This software was originally created by Westix-TI Lda. - Tel. Portugal - CE. The software lies within Business Tools, more precisely Finances. The most popular versions of the Gestix are 4.8 and 4.4.
From the developer:
Gestix Enterprise is a modular management solution with Certified Invoicing System.It allows you the quick import of customers' data from worksheet file, the automated invoicing of monthly contracts,it has an easily manageable serial number tracking solution and much more
You may want to check out more software, such as QuickBooks Premier: Multicurrency Edition, fBilling System or SSUPal, which might be related to Gestix.