Source: http://lifehacker.com/5599454/1dlus-is-a-swiss-army-knife-of-single+use-web-sites
Plenty of sites offer a quick IP address check, disposable email, URL shortening, image uploading, and quick text saving. 1dl.us offers all of them, on one page, for your bookmarking convenience.
1dl.us is fast-loading, bringing visitors to a page that's quickly filled with their IP address, a temporary email address for potentially spam-generating sign-ups, and a user agent checker. A minimalist tabbed view provides further access to image uploading, link shortening, and an online pastebin with optional password protection. There's also an instant password strength checker, but we're not always a fan of typing in your passwords anywhere where you don't know 100 percent of the rules and safety measures. But that's your call—the site doesn't seem to be sending your text anywhere—and five out of the six tabs here are very helpful for those who haven't already loaded their browser up with bookmarklets and add-ons to accomplish the same.
The services at 1dl.us are free to use, no sign-up required. Know of a better all-in-one web tool site? Share the love in the comments. Thanks for the tip Jackson!