Just because Glowstone is original doesn't mean it can't be familiar.
Use or code Bukkit plugins and they'll work natively with Glowstone, and enjoy first-class Bukkit2Sponge support for your Sponge powered plugins.
Glowstone's simplicity affords it a performance improvement over CraftBukkit and other servers.
By design, our code is simple and doesn't have to jump through hoops to work around the official Minecraft server in order to improve performance or functionality.
Glowstone is open-source and community centric.
Anyone can work on Glowstone, so it reflects what our community wants. And, with Glowstone's MIT license, you can create a private fork to suit the exact needs of your server. Don't know code? Provide your input in the design process!