Dextra - The DEX/ART reversing tool (For Linux/Mac/Android)

Disarm - My disassembler (For any platform)

Memento - Memory inspection/Core dumper utility (requires root) (For Linux/Mac/Android)

Jtrace64 - augmented, Linux/Android aware strace with plugin architecture (Better with root, Linux/Android)

Imjtool - Multi purpose image parser/extracter/whatever tool (For Linux/Mac/Android)