Design Mockup : Website and Apps (All devices)

Hi, We need to sketch 3 applications really asap: - Desktop Website - Tablet - Mobile Theses applications contains extended features like member sign-up, logins, payments, promotions pages, live preview, etc... in relation of gambling. We have 4 products to cover : P1, P2, P3, P4 The products P1 & P2 already exists as Website. The products P3 & P4 already exists as Application Mobile. For the Website : we need to MERGE all theses products to provides an homogeneous navigation. For the Application Mobile/Tablet, we need to mokup 2 existing applications, and provides new mokup based on the current website with P1 & P2. - Talented skills that allows minimal navigation. Clarity is crucial. Design should be done with the idea that theses products will be skinnable. Theses 3 versions should be sketch separately based on 2 existing app/website to merge. You choose a tool for sketching that allow Team collaboration. If there's any fee/signing, or license, let me know. We should provide 3 versions divided separately with sub-versions as follow: 1 Website/Desktop : sketching for P1, P2, P3, P4 all together 2 Mobile, divided as different products : 2.1 Sketch P1 2.2 Sketch P2 2.3 Sketch P3 2.4 Sketch P4 3 Tablet, divided as different products : 3.1 Sketch P1 3.2 Sketch P2 3.3 Sketch P3 3.4 Sketch P4 Important : - No CMS based mokup (like Joomla, ...etc), we are looking for a new fresh design, we provide the application on mobile to follow, and looking for someone with good skills to provide intuitive navigation between theses products. We need JUST the mokups (the development don't have to be done). So the design is mainly sketching, gray. Please provide any example of work you have done. Thanks.