Libero Silver, free. You do need to re-register every 12 months. The same chip, but in 250k LUT version has been available on the Microsemi Icicle for $499 sin

Libero Silver, free. You do need to re-register every 12 months. The same chip, but in 250k LUT version has been available on the Microsemi Icicle for $499 since late 2020. You can find that on Digikey and Mouser.