1. Android 42-Qt wallet. Find the cause of the app crash (details in PM) - 700 USD in 42
2. PoS Mod. In the generation should participate inputs with less than 1 CoinDay, or you need to find the way how to accelerate the process of inputs maturation - 1500 USD in 42
3. Anonymity improvement. Ring signature implementation, example on Python: https://gist.github.com/badmofo/92a0aa7c305b44ed1de8 - 5200 USD in 42