Twenty-seven speakers have already confirmed their presence at the Free Silicon Conference (#FSiC):

https://wiki.f-si.org/index.php/FSiC2019#Confirmed_invited_talks

The high-level design session will include speakers from:

1. Gaut (http://www.gaut.fr/)
2. GHDL (http://ghdl.free.fr/)
3. SpinalHDL (https://github.com/SpinalHDL)