Heroicons - Beautiful, free SVG icons from the makers of Tailwind CSS.
Figma Super Tidy - Figma plugin to easily align, rename and reorder your frames
Gradientify Icons - Interactive free SVG icons you can colorize as you wish
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Tabler Icons - 550+ free fully customizable SVG icons
Easometric Figma Plugin - With Easometric it's really easy to create isometric layers.