These cannot replace Trimble Access for complex road alignments or robotic total station control, but they are excellent for learning general surveying workflows.
Trimble offers an official to prospective buyers. This is the closest you can get to a "free download." Trimble Access Software Free Download
If a deal sounds too good to be true (like "permanent free download"), it is always a trap. Stick to official channels, protect your data, and survey with confidence. These cannot replace Trimble Access for complex road