1. MineVille: MineVille offers a variety of game modes including survival, creative, skyblock, and more. With frequent updates and a friendly community, MineVille provides a similar immersive experience to NiftyMC.

2. PixelmonCraft: If you enjoy Pokemon, PixelmonCraft is the perfect server for you. This server allows players to explore a world filled with Pokemon, complete quests, and battle other trainers. With unique gameplay elements and a dedicated community, PixelmonCraft offers a fun and engaging experience similar to NiftyMC.

3. Hypixel: Hypixel is one of the largest Minecraft servers and offers a wide range of game modes including mini-games, PvP battles, and more. With regular updates and events, Hypixel provides an immersive and dynamic experience for players looking for a similar server to NiftyMC.

4. CubeCraft Games: CubeCraft Games is known for its variety of mini-games and unique gameplay modes. With a focus on community engagement and player feedback, CubeCraft Games offers a similar experience to NiftyMC with its fun and interactive game modes.

5. The Hive: The Hive is a popular Minecraft server that offers a variety of mini-games and game modes. With a vibrant community and regular updates, The Hive provides a similar immersive experience to NiftyMC for players looking for a fun and engaging server to play on.