TMicrosoft Word
Internet4Classrooms: Using Microsoft Word's Menu Bar
for Mac for Windows
Internet4Classrooms: The Standard Toolbar for Mac & Windows
Internet4Classrooms: The Formatting Toolbar for Mac & Windows
Internet4Classrooms: The Drawing Toolbar for Mac & Windows

How to Make a Journal/Writing Paperusing digital pictures, clip art, and screen shots
Microsoft PowerPoint
Internet4Classrooms: Microsoft PowerPoint
University of Rhode Island PowerPoint Tutorial
Nick Dvoracek Using PowerpointPP handouts and how-to presentations
PowerPoint in the Classroom
geared towards students

Whitney Museum of American Art: Using PowerPointshows how to use PP to create your own stories -
PowerPointAnswers.comLots of information, and examples through this site
Brainy Betty's 35 best PowerPoint Tips and Tricks
Microsoft PowerPoint XP: Using Sounds and Video
Using United Streaming Videos in PowerPoint
Teacher Created Presentations
Primary Resources: Microsoft Powerpoint Presentationsscroll to the bottom of the page - presentations created by teachers for students - CVC words, compound words, I Can Smell, The Parts of a Plant/Flower, What do Plants Need to Grow? and Word Problems using a Numberline Jeopardy for the classroom, Who wants to Be a Millionaire?, Hollywood Squares, The Weakest Link
PowerPoints to download, modify, and use in your classroom

Cyber Exchange: PowerPoint Presentations Grades K-2ABC Soundoff, Parts of a sentence, telling or question are just a few of the teacher made PP on this site
Union County ETTC: Powerpoint PresentationsJeopardy, Who wants to be a Millionaire, Alphabet, Calendar Math, and more
NEBO: PowerPoint Shows Available for Downloadwide variety of subjects and levels
Vicki Blackwell PowerPoint Teacher Templateswide variety of already created templates
PowerPoint Templates & Sound Files
Sonia Coleman's Free Powerpoint Templates208 free PP templates for personal use
ManiActive: Free PowerPoint Background templates, Sound Files for PowerPoint
Website Free Powerpoint templatesabout 100 templates to download
Brainy Betty PowerPoint Templates for Teachers
PowerPoint Templates Free from Powerback
Microsoft Excel
Internet4Classrooms: Microsoft Excel
Dr. Christie's Using Spreadsheets in K-12 Classrooms
Brad James Tutorial: Excel 101
Classroom Resources for Excel

Thanks to jkemper & kskogsbakken for sharing!