Current tools do not provide adequate support to users for handling reminders. The main reason for this is the lack of use of rich context that speci- fies when a reminder should be presented to its recipient. We describe Cybre- Minder, a prototype context-aware tool that supports users in sending and re- ceiving reminders that can be associated to richly described situations involving time, place and more sophisticated pieces of context. These situations better define when reminders should be delivered, enhancing our ability to deal with them more effectively. We describe how the tool is used and how it was devel- oped using our previously developed Context Toolkit infrastructure for context- aware computing.