Uncommon 5E D&D Races — Dragonborn – Nerdarchy

The Half-Dragon - 86 subraces, very powerful homebrew race, add to your campaign at your own discretion or run an entire one based of it : r/DnDHomebrew

Alyssa T - Half-Dragon Race Character Concept

ArtStation - Half-Dragon Race Character Concept

A Veritable Hoard of Homebrew — The Children of Io were a type of variant

Exploiting Racial and Class Powers: Dragon Breath – Dungeon's Master

Kitsune Playable Race New Player Option for Dungeons & Dragons Fifth Edition – DMDave Publishing

One DnD: Ardling Race & Abilities, Explained

Orc (Dungeons & Dragons) - Wikipedia

Creating characters for your next D&D campaign? Use Ancestry & Culture instead of race - Polygon

Art] Children of the Dragon, the sequel to Half Dragon Player Race (see link in my comment for the full 67 pages work) : r/DnD