Автор: http://www.swissdelphicenter.ch

uses
  Registry;

procedure TForm1.Button1Click(Sender: TObject);
const
  UNINST_PATH = 'SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall';
var
  Reg: TRegistry;
  SubKeys: TStringList;
  ListItem: TlistItem;
  i: integer;
  sDisplayName, sUninstallString: string;
begin
  {
    ListView1.ViewStyle := vsReport;
    ListView1.Columns.add;
    ListView1.Columns.add;
    ListView1.Columns[0].caption := 'DisplayName';
    ListView1.Columns[1].caption := 'UninstallString';
    ListView1.Columns[0].Width := 300;
    ListView1.Columns[1].Width := 300;
   }
  Reg := TRegistry.Create;
  with Reg do
  try
    with ListView1.Items do
    try
      BeginUpdate;
      Clear;
      RootKey := HKEY_LOCAL_MACHINE;
      if OpenKeyReadOnly(UNINST_PATH) then
      begin
        SubKeys := TStringList.Create;
        try
          GetKeyNames(SubKeys);
          CloseKey;
          for i := 0 to subKeys.Count - 1 do
            if OpenKeyReadOnly(Format('%s\%s', [UNINST_PATH, SubKeys[i]])) then
            try
              sDisplayName := ReadString('DisplayName');
              sUninstallString := ReadString('UninstallString');
              if sDisplayName <> '' then
              begin
                ListItem := Add;
                ListItem.Caption := sDisplayName;
                ListItem.subitems.Add(sUninstallString);
              end;
            finally
              CloseKey;
            end;
        finally
          SubKeys.Free;
        end;
      end;
    finally
      ListView1.AlphaSort;
      EndUpdate;
    end;
  finally
    CloseKey;
    Free;
  end;
end;