Yahoo might not invent the next killer Web product. But the company wants surfers to be able to use  online applications, or “widgets,” without leaving the Yahoo kingdom.

In a blog post on Friday, Yahoo introduced a variety of new widgets from third-party Web developers that can be fused directly into Yahoo products.

The average person in the United States visits 85 sites a month, said Tapan Bhat, Yahoo’s senior vice president of integrated consumer experience in a blog post. “That just sounds exhausting. So we’ve spent a lot of time thinking about how we can ease the pain of site-hopping to help you do more things at once,” he wrote.

There’s a PayPal application that can integrate into a user’s Yahoo mail, as well as apps from personal finance service Mint.com and blogging tool WordPress which can be weaved into a person’s MyYahoo start page. Nearly 20 new widgets are now available for use in various Yahoo products, including a handful of apps for Internet enabled-TVs.

The move to open up Yahoo’s Web properties to widgets was actually begun during the reign of Jerry Yang, Yahoo’s co-founder who was replaced as CEO by Carol Bartz in January.