Ready-Made Web Exam Platform Needed

I’m ready to license an existing browser-based online testing system that I can start using right away—no custom build from scratch. My must-haves are:

• Web interface that works smoothly on desktop browsers, with separate admin and candidate dashboards.
• Robust multiple-choice question (MCQ) engine with timed exams, automatic scoring, result analytics, and downloadable reports.
• Central question bank, test scheduling, basic security, login system, and role-based permissions.
• White-label / self-hosted deployment with full rebranding—logo, colors, wording, even URL and email templates.
• Optional extras (nice to have): descriptive question support, webcam or screen-share proctoring, anti-cheating measures.

Please include in your reply:
1. Public or credentialed demo link.
2. Feature list highlighting everything above.
3. One-time or subscription pricing, plus licensing terms (user limits, update policy, source access).
4. Typical deployment requirements and turnaround time.

I’m ready to proceed immediately with the best ready-made solution, so showcase what you already have rather than proposing new development.