zxing
https://github.com/journeyapps/zxing-android-embedded
toasty
https://github.com/GrenderG/Toasty
retrofit
https://square.github.io/retrofit/
holograph
https://github.com/Androguide/HoloGraphLibrary
iTextPdf
https://kb.itextpdf.com/home/it5kb/installation-guidelines/installing-itext-g-for-android
Vinculación de vista
https://developer.android.com/topic/libraries/view-binding?hl=es-419
glide
https://github.com/bumptech/glide