Which one should I pick for a new project?

I can help you understand what each repository is for, so you can decide which fits your needs:

binarywang/wxjava — A comprehensive WeChat development Java SDK supporting:

• WeChat Pay
• Official Accounts (公众号)
• Mini Programs (小程序)
• Enterprise WeChat (企业微信)
• Video Accounts (视频号)
• Open Platform

This is for backend development integrating with WeChat services. It has strong maintenance signals (33k+ stars, active development) and supports multiple deployment frameworks.

pqpo/smartcropper — An Android image cropping library specialized for:

• ID cards
• Business cards
• Documents
• Photo intelligent boundary detection

This is for mobile UI/image processing, specifically document scanning scenarios.

Pick binarywang/wxjava if:

• You're building a Java backend that needs to integrate with WeChat (payments, messaging, authentication, mini-program servers, etc.)
• You need a mature, well-maintained SDK with multiple modules

Pick pqpo/smartcropper if:

• You're developing an Android app that needs to capture and crop document photos intelligently
• You need real-time boundary detection for photos

These solve completely different problems. What's your project about?

FOLLOW_UPS:

• Does your project need WeChat payment or messaging?
• Are you building Android mobile app or Java backend?
• Do you need document photo recognition capability?