SSRC is a small piece of software for converting sampling rates of PCM wav files. It also has a function to apply dither to its output and extend perceived dynamic range.
dex2jar is a tool collection to work on Android .dex and Java .class/.jar files. dex-reader can extract from executables (.dex/.odex), while dex-translator performs the conversion from dex-IR format, and returns optimized ASM. And d2j-smali is a bak/smali disassembler.