$ ls libr/*/p | grep : | awk -F / '{ print $2 }'
anal # analysis plugins
asm # assembler/disassembler plugins
bin # binary format parsing plugins
bp # breakpoint plugins
core # core plugins (implement new commands)
crypto # encrypt/decrypt/hash/...
debug # debugger backends
egg # shellcode encoders, etc
fs # filesystems and partition tables
io # io plugins
lang # embedded scripting languages
parse # disassembler parsing plugins
reg # arch register logic
rasm2 -L # list asm plugins
r2 -L # list io plugins
rabin2 -L # list bin plugins
rahash2 -L # list hash/crypto/encoding plugins
L # list core plugins
iL # list bin plugins
dL # list debug plugins
mL # list fs plugins
ph # print support hash algoriths
e asm.arch=? # list assembler/disassembler plugins
e anal.arch=? # list analysis plugins