I used 4DOS for many years, then 4NT, then TCC/LE, and for the last several years, the full blown TCC/TCMD. Which is not free, so doesn't fit in this discussion I'm afraid. TCC/LE is still available, and completely free and contains most of what's in the commercial product.
Don't confuse the order. Look at the dates. Stop development already for the free version (fxsound). Paid -> Free -> End of development and support only.