Kutools for Excel - A handy Microsoft Excel add-ins collection to free you from time-consuming operations.
DocDroid - DocDroid is a service for sharing document and slides.
SAFE TOOLBOXES - SAFE TOOLBOXES is an Excel add-in that enhances Excel capabilities to perform simulations...
SlideShare - Discover, Share, and Present presentations and infographics with the world’s largest professional content sharing community.
Devart Excel Add-ins - Devart Excel Add-ins allow you to connect Microsoft Excel to live database and cloud data and work with them as with usual Excel spreadsheets.
SlideOnline - Share PPT presentations online easily with a free PowerPoint presentation sharing platform