check it out

Check, compare, and correct spreadsheets.

Check if Web pages are alive or dead, catch errors and redirects.

Check for changes to the external IP address and update a dynamic DNS service.

Check for plagiarism in articles, patents, books, essays, and term papers.

Check for broken links on your website.

Check availability of domain names.

Check network connection and test connection speeds of various locations.

Check for spell errors in almost all applications.

Check your hard disks for errors and correct them. Easy to use, fast and free.

Check if the food you buy contains additives dangerous to your health. Freeware!