QUESTION: Are there GUI alternatives

[RustoMCSpit]

Your readme states

AFAIK, croc is the only CLI file-transfer tool does all of the following:

    allows any two computers to transfer data (using a relay)
    provides end-to-end encryption (using PAKE)
    enables easy cross-platform transfers (Windows, Linux, Mac)
    allows multiple file transfers
    allows resuming transfers that are interrupted
    does not require a server or port forwarding

What about GUI file-transfer tools? Are there any GUI tools that do all of these things? Are there any GUI tools you'd recommend that don't do all of these things but are still very good?