There are various alternatives to psc's default JavaScript backend:

Actively Maintained

source code	PS version	Target	Usability
andyarvanitis/purescript-native	0.14.x	C++11 or Go	all applicable tests in `purescript/tests/purs/passing` are passing
purerl/purerl	0.15.14	Erlang
pure-c/purec		C (Clang)
purenix-org/purenix	0.14.4	Nix
Unisay/purescript-lua	0.15.9	Lua	Alpha

Stale

source code	PS version	Target
lua-purescript/purescript	0.9.1.0	Lua
slamdata/truffled-purescript	0.7.5.x	Truffle (Graal)
osa1/psc-lua	0.5.x	Lua
Gabriel439/Purescript-to-Python		Python
PyreScript	0.9.1	Python
tfausak/thran	0.11.6	Haskell (GHC)
andyarvanitis/purescript-clojure		Clojure (JVM)
csicar/pskt		Kotlin
purescript-python/purescript-python	0.13.x	Python >= 3.5
epost/psc-query	0.11.7	Datalog
paulyoung/pureswift		Swift