Most of the algorithms out there already exist published "for free" - that isn't the hard part.
I found only Keccak.
They'd still need expensive software licenses + lots of time and reasonable sets of skills to synthesize + deploy bitstreams for a variety of hardware.
Vivado (webpack/design) tcl console + gcc/cmake, skill not needed just 1-click. Both free.
ps: VCU1525
Webpack edition wont build you Ultrascale+ bitstreams. Though I guess you could use the trial of the full version.