|Miner Kilbourne Kellogg, born Manlius Square, NY 1814-died Toledo, OH 1889 Public Domain Smithsonian American Art Museum and its Renwick Gallery|
There are hundreds of other online resources including some specialized websites such as the American Battle Monuments Commission where more than 200,000 Americans who died in WWI or WWII are honored.
Returning to cemetery websites, there are lots of smaller websites that have significant record sets such as Names in Stone.
Here is a website that is part of the USGenWeb Project. It is the Tombstone Transcription Project.