BrainyQuote.com and Goodreads.com each have pages devoted to positive quotes, as of 2015. On BrainyQuote, quotes are arranged by topic; on Goodreads, by tag. The featured quotes include those attributed to individuals from a wide array of disciplines.
On the Brainyquote homepage, click Topics, then click on Positive. Other topics, such as "Happiness" and "Hope," also contain positive quotes. On Goodreads, click Explore and select Quotes, then enter a specific tag or keyword in the quotes search field, or choose from the selection of tags along the right side of the page. Goodreads provides a "like" button for each quote, displays a running total of likes for each quote displayed and a link to the Goodreads page for each corresponding author or personality.