Here's a list of commands you can use: 
8ball
amazon
ask
bancount
bans
base64
beats
bing
bingimage
books
brainfuck
btc
bungee
cake
capitalise
choose
coin
color_parse
cookie
cypher
debase64
decrypt
decypher
derpify
dictionary
dinner
down
drama
e
encrypt
escape
expand
feed
flip
flirt
fml
fortune
gitio
googl
hash
help
horoscope
imdb
imgur
imguralbum
info
isbase64
isgd 
issues
isup
kernel
kill
lart
lastfm
lastfmcompare
leet
length
lmgtfy
lower
ltc
mcping
mcstatus
mcuser
mcwiki
metacritic
mlia
munge
namegen
newegg
note
octopart
osrc
password
ping
potato
pre
python
qrcode
rainbow
recipe
reddit
remind
resethistory
reverse
roll
rot13
rottentomatoes
sandwich
seen
shorten
showtells
slap
snopes
spalbum
spartist
spell
spotify
steam
steamid 
stock
suggest
superscript
swapcase
table
tell
titlecase
translate
tv 
tv_prev
twitch
twitter
twuser
ugroups
unescape
uperms
upper
urban
usa
validate
weather
whois
wiki
wolframalpha
wordoftheday
wpass
wrainbow
wyr
xkcd
youtime
youtube 
For detailed help, use .help <command>, without the brackets.