Displaying the list of Salesforce objects from the Org in Visualforce Page.

Here is the example to get all Salesforce objects in a picklist values from Salesforce org.

Visualforce page:

<apex:page sidebar="false" controller="ObjDisplay">

   <apex:form >

       ObjectName:

           <apex:selectlist multiselect="false" size="1">

                   <apex:selectOptions value="{!objNames}">

                   </apex:selectOptions>

          </apex:selectlist>

   </apex:form>

</apex:page>

Controller:

public with sharing class ObjDisplay {

     Map<String, Schema.SObjectType> gd = Schema.getGlobalDescribe();

     public List<SelectOption> getobjNames(){

          List<Schema.SObjectType> gd = Schema.getGlobalDescribe().Values();

          List<SelectOption> options = new List<SelectOption>();

          for(Schema.SObjectType f : gd){

               options.add(new SelectOption(f.getDescribe().getName(),f.getDescribe().getName()));

         }

        return options;

    }

}

Schema class Contains methods for obtaining schema describe information.