<apex:repeat... var="inputobj">
  <apex:outputpanel rendered="{!inputobj.type == 'standardinputfield'}"
    <apex:inputField required="{!inputobj.isRequired}" value="{!inputobj.data[f.apiName]}"
  </apex:outputpanel}"
  <apex:outputpanel rendered="{!inputobj.type == 'something'}"
  ...
  </apex:outputpanel}"
  <apex:outputpanel rendered="{!inputobj.type == 'something else'}"
  ...
  </apex:outputpanel}"
  ...
</apex:repeat>

<apex:page controller="MyPageController">
  <apex:sectionHeader title="My Section Title" />
  <apex:pageMessages id="pageMessages" />
  <apex:form id="theForm">
    <apex:dynamicComponent id="dynComp" componentValue="{!ControlTree}" />
  </apex:form>
</apex:page>

Component.Apex.InputText ctl = new Component.Apex.InputText();
ctl.label = field.label;
ctl.expressions.value = buildBindingExpression(field.name);

private string buildBindingExpression(string fieldName) {
  String expr = '{!ViewBag['' + fieldName + '']' + '}';
  return expr;
}