Image Export converts PowerPoint slides to high-quality images.
PPT2HTML exports HTML even from PowerPoint 2010 and 2013, gives you full control of PowerPoint HTML output, helps meet Section 508 accessibility requirements
Merge Excel data into PowerPoint presentations to create certificates, awards presentations, personalized presentations and more
Resize your presentations quickly and without distortion
Language Selector switches the text in your presentation from one language to another
FixLinks prevents broken links when you distribute PowerPoint presentations
Shape Styles brings styles to PowerPoint. Apply complex formatting with a single click.
Prep4PDF preserves interactivity in PowerPoint presentations when you convert to PDF
What's new/changed in Office 2013 aka Office 15?
What's new in PowerPoint?
For a human's-eye view of what's new in PowerPoint 2013, PowerPoint MVP Echo Swinford's Big List O' New Features in PowerPoint 2013 is the place to start.
The TechNet article, Changes in Office 2013, gives an overview of the changes to PowerPoint, the Office user interface and other Office components.
For a more technical overview targeted more at IT staff, visit What's new for IT professionals in Office 2013.
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