Quotations that are good for a welcome address can be found at write-out-loud.com, Goodreads and GIGA Quotes, as of 2015. Find-the-words.com offers guidelines for writing a welcome address as well as free examples.
Write-out-loud.com suggests several different examples of quotes to begin a welcome address. The site recommends adding adjectives to convey a chosen tone or mood. It also lists synonyms that can be used to make the address more interesting.
Goodreads lets users click on a quote to like it. Then it allows people to see how many likes a quote has, in case they want to choose the most popular quote.