Icons

1. Material Icons

https://material-ui.com/components/material-icons 
                                    
import AccessAlarmIcon from '@material-ui/icons/AccessAlarm';
import AccessibilityNewIcon from '@material-ui/icons/AccessibilityNew';
import AccountTreeIcon from '@material-ui/icons/AccountTree';
import AddRoadIcon from '@material-ui/icons/AddRoad';

// ----------------------------------------------------------------------

const MaterialIcons = () => {
    return(
        <AccessAlarmIcon>
        <AccessibilityNewIcon/>
        <AccountTreeIcon/>
        <AddRoadIcon/>
    );
}

2. Tabler Icons

https://tabler-icons.io/ 
                        
import { IconGridDots,IconAward,IconCalendar,IconMail } from '@tabler/icons-react';

// ----------------------------------------------------------------------

const TablerIcons = () => {
    return(
        <IconGridDots width={22} />
        <IconAward width={25} />
        <IconCalendar width={30}/>
        <IconMail width={40}/>
    );
}

3. Iconify Icons

https://iconify.design/ 
                        
import { Icon } from '@iconify/react/dist/iconify.js';

// ----------------------------------------------------------------------

const IconifyIcons = () => {
    return(
        <Icon icon="ic:round-check" fontSize={20} />
        <Icon icon="solar:pen-linear" fontSize={18} />
        <Icon icon="qlementine-icons:menu-dots-16" fontSize={24} />
        <Icon icon="iconamoon:search-light" fontSize={12} />
      
    );
}