Best icon applications in icon customization tools in 2025

🎨 Curated icons 💻 Icon applications in app design 💻 Icon applications in content creation 💻 Icon applications in creative projects 🎨 Icon applications in design flexibility 💻 Icon applications in development 🎨 Icon applications in marketing 💻 Icon applications in marketing materials 💻 Icon applications in presentations 💻 Icon applications in project communication 🎨 Icon applications in user engagement 🎨 Icon applications in user experience 🎨 Icon applications in web design 🎨 Icon libraries 🎨 Icons for designers