List of Free code Bytecode
DesignWizard is an API that supports the automated inspection of Java programs in a higher level than ASM bytecode manipulator.
Dynamac First of a kind reverse engineering tool for Java; built in ASM Analyzer and Bytecode Tracer, full reflection API and injection capabilities.
jackson module afterburner
Jackson module that uses bytecode generation to further speed up data binding (+30 40% throughput for serialization, deserialization).
A fluent API for generating Java byte code.
Java bytecode engineering toolkit.
Java Bytecode Modification Framework.
Jitescript Java API for Bytecode.
Java bytecode analysis/deobfuscation tool.