Cirq

Cirq is a Python software library for writing, manipulating, and optimizing quantum circuits, and then running them on quantum computers and quantum simulators. Cirq provides useful abstractions for dealing with today’s noisy intermediate-scale quantum computers, where details of the hardware are vital to achieving state-of-the-art results.

Open bounties:

• $100 | Create a gate to represent a PauliRotation
• $100 | CZSWAP and CXSWAP gate
• $100 | Add confusion maps support to PauliMeasurementGate

Closed bounties:

• $100 | Xa*Zb*Zb*Zb works but Xa*Zb**3 raises error
  closed by: rodolfocarobene
• $100 | Add an option to highlight a subset of qubits in cirq.Heatmap
  closed by: Yash-10