The following websites are excellent resources to inspire creative sermon writing:
Preaching and Worship
PreachingandWorship.org aims to provide easy access to excellent on-line resources for preparing sermons and worship services for a wide range of denominations and traditions—a bit like a Google, Bing, or Yahoo search, specifically designed for preachers.
Academy of Preachers
The Academy of Preachers seeks to Identify, Network, Support and Inspire young people in their call to Gospel preaching.
Patheos – Preachers
Patheos.com is the premier online destination to engage in the global dialogue about religion and spirituality and to explore and experience the world's beliefs.
Working Preacher has been a trusted source of inspiration, interpretation and imagination for preachers across the globe -- all for free.