CitoWise, a mobile ETH/ETHC wallet recently added support for POA. They focus on making investments in ICOs easier by integrating with ICO’s KYC, and doing due-diligence the ICO is not an obvious scam, by analyzing the WP, doing background checks on the team members, and arranging a call with the founders. They can also restrict contributions by country.
CitoWise has announced POA support on their blog and are open to additional joint marketing messaging. https://blog.citowise.com/trezor-integrated-2-new-languages-new-blockchain-etc-and-more-5bd3af0611ab
It would be great to list them as a supported wallet at https://poa.network/tokens under the Wallets section.