apex:pageBlock title="Object Details in this environment" id="oD_list"
    apex:pageBlockTable value="{!objectdetail}" var="o"
        apex:column value="{!o.objectname}"/apex:column
        apex:column value="{!o.apiname}/apex:column
    apex:pageBlockTable
apex:pageBlock

String objectName, apiName;
List<ObjectDetails> ODList=new List<ObjectDetails>();
ObjectDetails odObl=new ObjectDetails();
public List<ObjectDetails> getObjectDetail(){
     for(Schema.SObjectType sO: Schema.getGlobalDescribe().values()){
        Schema.DescribeSObjectResult oRE = sO.getDescribe();
        odObl.objectName=oRE.getLabel();
        odObl.apiName=oRE.getName();
        ODList.add(odObl);
    }
    return ODList;
}
public String getobjectName(){
    return objectName;
}
public String getapiName(){
    return objectName;
}