When you hit the home page at Textkit.com it looks pretty sad. The site is obviously broken, the image and CSS files having been stored and linked from a rackspacecloud.com account which seems to have expired. The Facebook page is also pretty much dead. But if you go to the forums you’ll see that the community is still thriving. It also seems that the files themselves are still available.
A forum thread addresses the recent absence of the site’s founder, Jeff Tirey, and the need for additional moderators to manage the forums.
As of this writing, the domain registration expires in 2019, so the site may disappear into the InterWebs black hole after that. Though the Internet Archive Wayback Machine frequently saves the site, as usually happens, the downloads aren’t archived. So if you think you might need them in the future, you should probably snag them at your earliest opportunity.