Plugins

The plugin ecosystem in UE 5.7 has three sources:

Source	Examples
Built-in	Ships with the engine; toggle in Plugins window
Marketplace / Fab	Downloaded into <Project>/Plugins/ or <Engine>/Plugins/Marketplace/
Community / GitHub	Cloned into <Project>/Plugins/ and compiled

Start with

• Catalog — full plugin list, organized
• Essential — what every project should enable

By category

• Rendering — visual fidelity stack
• Audio — synthesis, mixing, middleware
• UI — UMG, Common UI, web rendering
• Animation — Control Rig, Motion Matching, MetaHuman
• Networking — replication, RPC, Iris
• Editor Extensions — Python scripting, tools
• Web & Streaming — Pixel Streaming, NDI, media frameworks
• AI Tools — LLM integration, MCP
• Third-Party — major Marketplace plugins worth knowing
• UnrealClaudeMCP — deep-dive on driving UE from MCP clients

Discovery

Where	What
Edit → Plugins in the editor	All available built-in + installed plugins
Fab / Marketplace	Paid + free third-party
GitHub topic unreal-plugin	Community open source
Awesome Unreal	Curated lists