NecroDice

From the "Read Me": NecroDice (formerly known as Dice Roller) is a free, friendly and easy to use, yet powerful d20 System dice roller. Written entirely in C# (C Sharp), NecroDice can easily become a replacement for an entire d20 Dice Set, provided that a computer is available. User summary: NecroDice is released under the GNU-GPL and is freely available from SourceForge.