For those of you who may have missed a Catch of the Day or who didn't have the opportunity to look at some of them during this past week, here's a second chance.
Monday
Kids' Science Challenge is a free national competition where students in grades 3-6 submit experiments and problems for real scientists and engineers to solve.
Tuesday
Sci2ools is a suite of free online productivity tools from SciWeavers that includes an international on-screen keyboard, image-to-text conversion, web page to pdf, a LaTeX editor, and more.
Wednesday
PDFaid provides a collection of free online tools to help you make a number of useful modifications to your PDF files.
Thursday
Maintain your anonymity and protect your privacy while accessing free wi-fi hotspots with the Internet connection protector Hotspot Shield.
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