Which one should I pick for a new project?

I can only answer questions about jakewharton/butterknife or snailclimb/guide-rpc-framework. However, these are two completely different tools for different purposes, so the choice depends on your needs:

jakewharton/butterknife — Use this if you're building an Android application and need to bind views and handle view callbacks. However, note that the project is now deprecated. According to the README, you should switch to Android's view binding instead. The repository will only receive critical bug fixes for integration with AGP; feature development has stopped.

snailclimb/guide-rpc-framework — Use this if you're building an RPC (Remote Procedure Call) framework or learning RPC principles. According to its README, it's designed as an educational project to understand RPC fundamentals and Java coding practices. The framework includes features like Netty-based networking, multiple serialization methods (Kryo, Protostuff, Hessian), Zookeeper service registration, load balancing, and timeout protection.

Summary:

• Android View Binding → Use Android's built-in view binding (not Butterknife)
• RPC Framework → guide-rpc-framework (if learning), or a production RPC framework like gRPC or Dubbo

FOLLOW_UPS:

• What Android view binding features does Butterknife provide?
• What serialization methods does guide-rpc-framework support?
• Is guide-rpc-framework suitable for production use?