Windows: If you like your software open-source, you'll definitely want to check out UltraDefrag, a snappy open-source Windows disk defragmenter.
UltraDefrag is available as a portable application and in a GUI and ultra lightweight command-line only version—the lightweight version is designated as "micro" in the download list and is at the top of the screen, make sure to scroll down for the GUI version if you want to interact with the program like in the screenshot above.
With UltraDefrag you can defragment your entire disk, defragment based on the file and folder—handy if your disk defragmentation is limited to a handful of frequently edited and altered files—and set it up to defragment during the boot process to access files Windows usually has locked.
UltraDefrag is open-source and available for 32-bit and 64-bit editions of Windows. Have a favorite tool for managing your disks? Let's hear about it in the comments.
UltraDefrag [via DownloadSquad]
Tools that help you download videos from YouTube and other video sharing services on the web are old hat, but BenderConverter is a simple-to-use web-based solution with a wide variety of download options.
At BenderConverter you can not only perform the basic conversions available at most conversion sites—like turning a web-based video into an MPEG or AVI file—but you can also download it as an audio file (MP3 and WAV) or a variety of video files like 3GP for phones, MOV, MP4, and WMV. You can even download it converted to an animated GIF or have BenderConverter convert the frames into JPEG images.
Saving something as a PDF file is a great way to preserve it for future reference or for sharing with others, without risking the site changing before you look at it again. PDFMyURL makes it easy to convert sites to PDF.
Point PDFMyURL at a website URL and it will convert the site into a PDF document. Not only can you do a simple conversion just by plugging in a URL but you can also modify the PDF with a wide variety of flags—see the advanced menu for a full list—that let you set the page orientation and size, header information, print orientation, and more. PDFMyURL also has a bookmarklet you can drag to your toolbar for easy access to the PDF creation service.
PDFMyURL is a free service and doesn't watermark or otherwise alter the site you are converting to PDF. Have a favorite tool for PDF conversion or a bookmarklet that makes life easier? Let's hear about it in the comments.
Windows/Linux: It's one thing to be able to quickly search through file names using a program like 
