Web Application Icons

adjust
anchor
archive
area-chart
arrows
arrows-h
arrows-v
asterisk
at
audio-description
automobile (alias)
balance-scale
ban
bank (alias)
bar-chart
bar-chart-o (alias)
barcode
bars
battery-0 (alias)
battery-1 (alias)
battery-2 (alias)
battery-3 (alias)
battery-4 (alias)
battery-empty
battery-full
battery-half
battery-quarter
battery-three-quarters
bed
beer
bell
bell-o
bell-slash
bell-slash-o
bicycle
binoculars
birthday-cake
blind
bluetooth
bluetooth-b
bolt
bomb
book
bookmark
bookmark-o
braille
briefcase
bug
building
building-o
bullhorn
bullseye
bus
cab (alias)
calculator
calendar
calendar-check-o
calendar-minus-o
calendar-o
calendar-plus-o
calendar-times-o
camera
camera-retro
car
caret-square-o-down
caret-square-o-left
caret-square-o-right
caret-square-o-up
cart-arrow-down
cart-plus
cc
certificate
check
check-circle
check-circle-o
check-square
check-square-o
child
circle
circle-o
circle-o-notch
circle-thin
clock-o
clone
close (alias)
cloud
cloud-download
cloud-upload
code
code-fork
coffee
cog
cogs
comment
comment-o
commenting
commenting-o
comments
comments-o
compass
copyright
creative-commons
credit-card
credit-card-alt
crop
crosshairs
cube
cubes
cutlery
dashboard (alias)
database
deaf
deafness (alias)
desktop
diamond
dot-circle-o
download
edit (alias)
ellipsis-h
ellipsis-v
envelope
envelope-o
envelope-square
eraser
exchange
exclamation
exclamation-circle
exclamation-triangle
external-link
external-link-square
eye
eye-slash
eyedropper
fax
feed (alias)
female
fighter-jet
file-archive-o
file-audio-o
file-code-o
file-excel-o
file-image-o
file-movie-o (alias)
file-pdf-o
file-photo-o (alias)
file-picture-o (alias)
file-powerpoint-o
file-sound-o (alias)
file-video-o
file-word-o
file-zip-o (alias)
film
filter
fire
fire-extinguisher
flag
flag-checkered
flag-o
flash (alias)
flask
folder
folder-o
folder-open
folder-open-o
frown-o
futbol-o
gamepad
gavel
gear (alias)
gears (alias)
gift
glass
globe
graduation-cap
group (alias)
hand-grab-o (alias)
hand-lizard-o
hand-paper-o
hand-peace-o
hand-pointer-o
hand-rock-o
hand-scissors-o
hand-spock-o
hand-stop-o (alias)
hard-of-hearing (alias)
hashtag
hdd-o
headphones
heart
heart-o
heartbeat
history
home
hotel (alias)
hourglass
hourglass-1 (alias)
hourglass-2 (alias)
hourglass-3 (alias)
hourglass-end
hourglass-half
hourglass-o
hourglass-start
i-cursor
image (alias)
inbox
industry
info
info-circle
institution (alias)
key
keyboard-o
language
laptop
leaf
legal (alias)
lemon-o
level-down
level-up
life-bouy (alias)
life-buoy (alias)
life-ring
life-saver (alias)
lightbulb-o
line-chart
location-arrow
lock
low-vision
magic
magnet
mail-forward (alias)
mail-reply (alias)
mail-reply-all (alias)
male
map
map-marker
map-o
map-pin
map-signs
meh-o
microphone
microphone-slash
minus
minus-circle
minus-square
minus-square-o
mobile
mobile-phone (alias)
money
moon-o
mortar-board (alias)
motorcycle
mouse-pointer
music
navicon (alias)
newspaper-o
object-group
object-ungroup
paint-brush
paper-plane
paper-plane-o
paw
pencil
pencil-square
pencil-square-o
percent
phone
phone-square
photo (alias)
picture-o
pie-chart
plane
plug
plus
plus-circle
plus-square
plus-square-o
power-off
print
puzzle-piece
qrcode
question
question-circle
question-circle-o
quote-left
quote-right
random
recycle
refresh
registered
remove (alias)
reorder (alias)
reply
reply-all
retweet
road
rocket
rss
rss-square
search
search-minus
search-plus
send (alias)
send-o (alias)
server
share
share-alt
share-alt-square
share-square
share-square-o
shield
ship
shopping-bag
shopping-basket
shopping-cart
sign-in
sign-language
sign-out
signal
signing (alias)
sitemap
sliders
smile-o
soccer-ball-o (alias)
sort
sort-alpha-asc
sort-alpha-desc
sort-amount-asc
sort-amount-desc
sort-asc
sort-desc
sort-down (alias)
sort-numeric-asc
sort-numeric-desc
sort-up (alias)
space-shuttle
spinner
spoon
square
square-o
star
star-half
star-half-empty (alias)
star-half-full (alias)
star-half-o
star-o
sticky-note
sticky-note-o
street-view
suitcase
sun-o
support (alias)
tablet
tachometer
tag
tags
tasks
taxi
television
terminal
thumb-tack
thumbs-down
thumbs-o-down
thumbs-o-up
thumbs-up
ticket
times
times-circle
times-circle-o
tint
toggle-down (alias)
toggle-left (alias)
toggle-off
toggle-on
toggle-right (alias)
toggle-up (alias)
trademark
trash
trash-o
tree
trophy
truck
tty
tv (alias)
umbrella
university
unlock
unlock-alt
unsorted (alias)
upload
user
user-plus
user-secret
user-times
users
video-camera
volume-control-phone
volume-down
volume-off
volume-up
warning (alias)
wheelchair
wifi
wrench

You can see all other fontawesome icons here and icofonts here