Build a CRM/TMS App

I require an app compatible on windows and Mac, and one which is synced between all users. It needs to be simple and clean, a two page design. First page: I need all my contact's details, linked to my gmail and LinkedIn accounts, listed in the following columns: Name+Surname; I.D number; Profession; Nationality+ Current Company; Email+Phone Number; All correspondence via gmail; All correspondence+relationship via Linked In; All correspondence related to contact (i.e. correspondence with others about the contact); Notes; Document uploader Second page: Company details+website; Company Services; Contact person; Contact numbers; Address; All correspondence via gmail; All correspondence related to contact; Notes; Document uploader These columns should fill themselves from being connected to Gmail and LinkedIn, but where the information is not available columns need to be editable. I need to be able to add, edit, and remove columns as I please too. This will be an ongoing project and there is an opportunity to become a partner in a large globally developing company.