Welcome to the AppExchange, your complete marketplace for cloud computing applications and consulting partners. Before you can make your own app or service publicly available to potential customers (also known as publishing a listing), you must be a Salesforce partner. If you're not a partner, visit http://www.salesforce.com/partners to learn more.
If you’ll be publishing apps on the AppExchange, install the free License Management App (LMA) app. With the LMA you can automatically receive notification every time your package (app) is installed or uninstalled, thus letting you track users and easily notify them of any upgrades you publish.