From material design, Apache License version 2.0:

contact_support_black_24dp.svg
email_black_24dp.svg
home_work_black_24dp.svg
iban.svg
totp.svg
outline_contact_support_black_24dp.png
outline_email_black_24dp.png
outline_home_work_black_24dp.png
outline_iban_24dp.png
outline_stay_current_portrait_black_24dp.png
outline_totp_24dp.png
outline_video_camera_front_black_24dp.png
stay_current_portrait_black_24dp.svg
video_camera_front_black_24dp.svg

European union (official project logos):
ngi_ledger.png
bandiera_stelle.png

The Noun project:
noun_blindfold_3574196.svg


Anastasis SARL (official logo, used with permission):
logo.png

FreeOTP (official logo, Free Software):
freeotp.svg
freeotp.png