Microsoft ApplicationsFREE
Photosynthhttp://photosynth.netTake photos and then combine to make 3d viewGeotagyour synthsAdd to bing maps
Bing Mapshttp://www.bing.com/maps/explore(doesn't work with Chrome)Map apps- overlay tweets onto maps- todays front pages - photosynths (ShinfieldJunior school) - World Tours  - Health maps for the USBuild your own map apps 
Bing Visual Searchhttp://www.bing.com/visualsearch?FORM=Z9LH4 Similar to Pivot but web based(Only appears to work on IE and Firefox)
Community Clipshttp://www.officelabs.com/projects/communityclips/Pages/Default.aspxScreen recorderSits within PowerPoint, excel and word in Office 2007/2010Can also works as a standalone app in taskbar
World Wide Telescopehttp://www.worldwidetelescope.org/Home.aspx Software + servicesSmall download that links to the cloud to get up to date informationClick on stars gives further details about them, links to articles about the stars
Pivothttp://www.microsoft.com/silverlight/pivot/Filtering and sorting data graphicallyCreate your own collectionsCreate in excel then convert in to a collection
Deep ZoomInteractively view high resolution imagesCreate your own Deep Zoom imagesdeep zoom composer -http://www.microsoft.com/downloads/details.aspx?FamilyID=457B17B7-52BF-4BDA-87A3-FA8A4673F8BF&displaylang=enExample – Hard Rock Cafe
SkyDrivehttp://skydrive.live.com/25Gb free online storage 
Office Web AppsWeb apps for word, excel, PowerPoint and one note Collaborative editing of docsSimultaneous editing of docshttp://lifehacker.com/5561225/comparing-office-2010-desktop-and-office-web-apps-in-pictures
Bing Translatorhttp://www.microsofttranslator.comTranslateon the website or in Live Messenger (Tbot), invite into a conversation with a foreign speakerTranslator widget that can be embedded in to SharePoint or a website.
Windows Live Essentialshttp://download.live.com/Live Writerwrite blog posts offline and post directly to blog Live Photo Galleryhuge amount of toolspanoramas photo fuse etcLive Movie Maker Change speed         trimming         stop frame animation starting to get closer to iMovie          new versions only on Win7 and Vista, old versions will work on XP
Maths Worksheet Generatorhttp://www.educationlabs.com/projects/MathWorksheetGenerator/Pages/default.aspxPut in an example sum and it will then generate a maths question sheet.From simple sums to quadratic equationsWorks from office 2003
Photo Storyhttp://www.microsoft.com/windowsxp/using/digitalphotography/photostory/default.mspxConvert images into a video, add sound and animations.Export to mobile phones.
Songsmithhttp://research.microsoft.com/en-us/um/redmond/projects/songsmithSongsmithgenerates musical accompaniment to match a singer’s voice.
AutoCollagehttp://research.microsoft.com/en-us/um/cambridge/projects/autocollage/Image processing program which automatically creates collages of your pictures.
Koduhttp://fuse.microsoft.com/kodu.htmlVisual programming language made specifically for creating games.Works on both X-Box 360 and Windows PC.
XNAhttp://creators.xna.com/en-GB/Cross platform, XBox/Windows PC/Windows PhoneMarketplace for phone & XBoxFree for studentsRacing game - download play/modify (http://creators.xna.com/en-GB/starterkit/racinggame)
DreamSparkhttps://www.dreamspark.com/default.aspxFree access to developer and designer tools for students
Ribbon Herohttp://www.officelabs.com/ribbonheroAdd-in for office 2007/2010TrainingChallengesLink to Facebook
Mouse Mischiefhttp://www.microsoft.com/multipoint/mouse-mischiefMultiple mouse input to PowerPoint25 maximum miceOffice 2007/2010
Flashcardshttp://flashcards.educationlabs.com/Create and share flashcards online
pptPlexhttp://www.officelabs.com/projects/pptPlex/Pages/default.aspxNon-linear PowerPoint presentations.Zoom in and out of sections of a presentation.
Partners in Learninghttp://blogs.msdn.com/b/teachershttp://uk.partnersinlearningnetwork.comhttp://youtube.com/user/innovativeteachGlobal community of educators.Resources and support for using Microsoft technologies.
Accelerators for IE8Translate with BingMap with Bing
Digital Literacy Curriculumhttp://www.microsoft.com/uk/education/schools/curriculum-resources/digital-literacy-curriculum.aspx5 modules2-3hrs per moduleDigital literacy certificateEntry level 3 qualification34 different languagesTeacher resources if using in school
The previous applications might be free BUT, the system requirements might mean that you will need to update either Windows or Office to get them to work!

Free Microsoft Apps