Download of GuitarTempus Virtual Guitar VST 2.0 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The actual developer of the software is Syntheway. We recommend checking the downloaded files with any free antivirus.
From the developer:
GuitarTempus is a virtual guitar designed to emulate the acoustic (nylon, six and twelve steel string), semi acoustic (hollow body) and electric 'clean' guitars. Available as plugin in VST 32 bit and 64 bit and VST3 64 bit versions for Windows as well as in Audio Unit, VST and VST3 for macOS.
You may want to check out more software, such as Sitargen Virtual Sitar VST, VST3, AU, Bassesland Bass VST VST3 Audio Unit or Guitar Analyzer, which might be related to GuitarTempus Virtual Guitar VST.