Here you can find some useful development resources that I have found

CSS
🔗 Box Shadows
🔗 CSS Reference
🔗 CSS Effects
🔗 CSS Shadow Generator
🔗 Collections of layouts and patterns in CSS
🔗 Custom Shape Divider
🔗 Beautiful colored gradients
🔗 Free svg background generator
🔗 CSS Animations on Demand

General references
🔗 Web skills
🔗 Animations library
🔗 285 Favorite JavaScript Utilities

Icons, avatars references
🔗 Quality metadata badges
🔗 Icons and Photos For Everything
🔗 Open Source Icons
🔗 Thousands of icons, one unified framework
🔗 Vector Icons
🔗 The Definitive Open Source Icons Library
🔗 Avatar generator

Thanks for reading! TM