The striker has agreed to return to Richmond Park after spells at Sligo Rovers and Shamrock Rovers, while the winger has renewed his contract with the league champions
Quigley played up front for the Saints between 2006 and 2009, scoring 52 goals in 154 appearances before moving to Bohemians. After helping Bohs lift the Setanta Sports Cup in his first season at the club, Quigley moved to Dundalk, and then to Sligo Rovers. The striker scored 12 goals in Sligo's league title winning season, before spending last season at Shamrock Rovers.
St Pat's had been expected to lose Forrester during the transfer window, but a move to Bristol City fell through following Sean O'Driscoll's departure as Robins manager. The 20-year-old joined the Saints in 2012 from Bohemians, and has made an immediate impact at the club, winning the PFAI Young Player of the Year award in his first season, and the Airtricity Premier Division in his second.
Forrester also received his first call-up to the Republic of Ireland Under-21 squad in 2013, and has won two caps so far for the Boys in Green. He is the 19th player to agree to play for Pat's in the 2014 League of Ireland season, as Liam Buckley looks to build on the club's title win.