"צביעה באוכלים" (coloring in foods) - the stringent view of some poskim
דבר דבר (Dabair Davar): What Type of Requests Are Okay?;
מחמת חסרון כיס Machmas Chesron Kis: Moving a Refrigerator;
The Proper Procedure for Checking One's Blood on Shabbos (e.g., for Diabetics);