All exchanges we are currently listed on are visible on Hush website: https://myhush.org/

I would currently suggest using the newest Agama release 0.3.6 or the web wallet at https://wallet.myhush.org/

Desktop wallets are still very much a work in progress, but here's a link to one of them anyways, it has binaries too https://github.com/hushmate/HUSHmate-swing-wallet/releases