Download of ServoSoft 4.2.114 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 actual developer of the software is ControlEng Corporation. ServoSoft lies within Business Tools, more precisely Project Management.
From the developer:
SERVOsoft is an indispensable tool for drive systems suppliers, machine manufacturers, mechanical, electrical and application engineers who work with servo systems.
SERVOsoft sizes complete servo systems, not just a single axis motor and inverter, but all components of a multi-axis servo system including rotary and linear motors, gear motors, gearboxes, couplings, drives, inverters, infeed, capacitor and bleeder modules, with 14 mechanisms and up to 20 axes in a shared bus or stand alone configuration.
You may want to check out more software, such as OSReset or GiftWorks, which might be similar to ServoSoft.