The alternative lines style doesn't use filling and controlled by two options for main and alternative stroke colors for SVG shapes. In general, this style emphasizes some details of an icon and can give you an unusual effect. Please keep in mind that this style is not appropriate for all icons.

NOTE: Despite the different version numbers of WordPress plugin and jQuery one, the main content (these icons) is the same.

miscellaneous icons

adjust

alarm

anchor

apple

balance

ban

bank

bar-chart

battery-charge

battery-full

battery-low

bell

bomb

box-add

box-delete

box-extract

box

briefcase

british-pound

brush

bug

building

bulb

calculator

calendar

camcoder

camera

car

check-alt

check

circle

clapboard

clock

close

cloud-download

cloud-upload

coins

comment

comments

compass

credit-card-in

credit-card-out

dashboard

desktop

diagram

dislike

divide-alt

divide

download

drop

dropper

envelope-pull

envelope-put

euro

external-link

file-export

file-import

fire

flag

gear

gears

gift

globe

grid

hammer

handcuffs

hand-bottom

hand-left

hand-right

hand-top

heart

help

home

hourglass

idea

image

info-alt

info

lab

label-hot

label-new

leaf

legal

lightning

like

line-chart

link

list

location

New

location-alt

lock

magic

magnet

map

minus-alt

minus

multiply-alt

multiply

music

New

notebook

octagon

paper-clip

paper-plane

pen

pencil

phone-alt

phone

pie-chart

piggybank

plus-alt

plus

print-doc

print-image

New

priority-high

New

priority-low

pulse

question-alt

question

remove

servers

responsive

rocket

satellite

save

scissors

screenshot

search

settings

share-alt

share

shield

shoppingcart-in

shoppingcart-out

shoppingcart

sky-dish

smartphone

sort

square

star-half

star

step-four-fifth

step-full

step-one-fifth

step-one-fourth

step-one-third

step-three-fifth

step-three-fourth

step-two-fifth

step-two-fourth

step-two-third

stopwatch

tablet

tag

thumbnails-big

thumbnails-small

timer

touch

trash

trophy

truck

umbrella

unlink

unlock

upload

us-dollar

user

users

warning-alt

warning

wifi

wine-glass

wrench

zoom-in

zoom-out

arrows icons

angle-wide-bottom-alt

angle-wide-bottom

angle-wide-left-alt

angle-wide-left

angle-wide-right-alt

angle-wide-right

angle-wide-top-alt

angle-wide-top

arrow-bottom-alt

arrow-bottom

arrow-left-alt

arrow-left

arrow-right-alt

arrow-right

arrow-top-alt

arrow-top

caret-bottom

caret-left

caret-right

caret-top

chevron-bottom-double

chevron-bottom

chevron-left-double

chevron-left

chevron-right-double

chevron-right

chevron-top-double

chevron-top

more

refresh

retweet

rotate-left

rotate-right

scroll

scroll-alt

swap-horizontal

swap-vertical

redo

two-pointers

undo

morphs icons

morph-add-remove

morph-arrow-left-right

morph-arrow-top-bottom

morph-bar-chart

New

morph-bell

morph-brightness

morph-bulb

morph-bookmark

morph-celsius-fahrenheit

morph-checkbox-1

morph-checkbox-2

morph-checkbox-3

morph-checkbox-4

morph-chevron-close

morph-chevron-left-right

morph-chevron-top-bottom

morph-clock

New

morph-cloud

morph-connect

morph-desktop-smartphone

morph-desktop-tablet

morph-doc

morph-envelope

morph-eye-open-close

morph-flag

morph-folder

morph-fullscreen-close

morph-fullscreen

morph-glass

morph-heart

morph-link

morph-lock

morph-login

morph-login2

morph-map

morph-menu-arrow-bottom

morph-menu-arrow-left

morph-menu-arrow-right

morph-menu-arrow-top

morph-menu-collapse

morph-menu-close

morph-menu-close-alt

morph-microphone

morph-minus-plus

morph-orientation-smartphone

morph-orientation-tablet

morph-pin

morph-play-pause

morph-play-stop

morph-powerswitch

morph-preview

New

morph-quality

morph-radio-1

morph-radio-2

morph-radio-3

morph-radio-4

morph-resize-diagonal

morph-resize-left-right

morph-resize-top-bottom

morph-search-close

morph-shield

morph-slider-left-right

morph-slider-top-bottom

morph-smile

morph-sort

New

morph-sort-alt

morph-speaker

morph-stack

morph-star

morph-sun-moon

morph-table-lamp

morph-tablet-smartphone

morph-thumbnails-close

morph-toggle-1

morph-toggle-2

morph-umbrella

morph-zoom

background morphs icons

morph-circle-octagon

morph-circle-octagon2

morph-circle-rounded

morph-circle-smooth

morph-circle-square

morph-circle-square2

morph-circle-sticker

morph-circle-sticker2

morph-circle-triangle

morph-circle-triangle2

morph-octagon-rounded

morph-octagon-smooth

morph-octagon-square

morph-octagon-square2

morph-octagon-sticker

morph-octagon-sticker2

morph-octagon-triangle

morph-octagon-triangle2

morph-octagon2-rounded

morph-octagon2-smooth

morph-octagon2-square

morph-octagon2-square2

morph-octagon2-sticker

morph-octagon2-sticker2

morph-octagon2-triangle

morph-octagon2-triangle2

morph-rounded-smooth

morph-rounded-square

morph-rounded-square2

morph-rounded-sticker

morph-rounded-sticker2

morph-rounded-triangle

morph-rounded-triangle2

morph-smooth-square

morph-smooth-square2

morph-smooth-sticker

morph-smooth-sticker2

morph-smooth-triangle

morph-smooth-triangle2

morph-square-sticker

morph-square-sticker2

morph-square-triangle

morph-square-triangle2

morph-square2-sticker

morph-square2-sticker2

morph-square2-triangle

morph-square2-triangle2

morph-sticker-triangle

morph-sticker-triangle2

morph-sticker2-triangle

morph-sticker2-triangle2

weather icons

weather-cloud-sun

weather-cloud

weather-rain-thunder

weather-rain

weather-snow

weather-sun

weather-thunderstorm

wind-east

wind-north

wind-south

wind-west

wind

loaders icons

loader-1

loader-2

loader-3

loader-4

loader-5

loader-6

loader-7

loader-8

loader-9

loader-10

loader-11

loader-12

loader-13

loader-14

loader-15

New

loader-16

Don't forget to play with a lot of options within the Configuration Tool Check it