There is the Eastern Orthodox Catrholic Churches, the Greek Orthodox Church, the Ukrainian Catholic Church.
http://en.wikipedia.org/wiki/Sect#In_Christianity
Roman Catholic sects
There are many groups outside the Roman Catholic Church which are regarded as Catholic sects, such as the Community of the Lady of All Nations, the Palmarian Catholic Church, the Philippine Independent Church, the Brazilian Catholic Apostolic Church, the Free Catholic Church, the Movement for the Restoration of the Ten Commandments of God, and others.
None of these are Catholic, any more than saying that the Church is a Jewish sect. Sorry.