Outlook VSTO Add-in

Need an Outlook Add-in compatible with Outlook 2010/13/16. Compatibility with Mac, if feasible at all, will be investigated during stage two. Experience in working with audio and recordings appreciated. The finished software should easily support multiple languages. A licensing platform will be integrated. Needless to say that the software MUST be well formatted and commented in English and that the developer must be willing to sign an NDA contract and hands off the code and software property exclusively to the client. This job, if successful, will lead to a stage-two, that we would preferably complete with the same developer and to possible upcoming jobs. On the longer term, we aim to start working with a handful of selected professionals to offload all our development needs. More info will be provided upon initial contact.