Yes, Litmos does offer custom branding, themes, and connected instances for resellers and OEM customers. Users can create unlimited customer and partner brands with themes, HTML, CSS, and JavaScript. Custom branding can include your logo, color schemes, and other visual elements, while connected instances enable you to manage multiple client accounts efficiently. These features allow you to tailor the learning management system (LMS) to match your brand and provide a seamless experience for your entire external ecosystem.