Two things have always annoyed me about the Skyrim Radiant system.

1. The story manager will often send you to a dungeon that you have already cleared once it has reset.

2. You can refuse a radiant quest but only before you know where it will send you. Once you know where the quest is located it's too late to refuse it.

This mod is designed to rectify these two issues - it tracks every location the player visits and checks whether it has been cleared or not. Once a location is cleared it is added to a master list. The appropriate radiant quests are modified to include this list of cleared locations in the location alias conditions.

There is also an optional plugin which gives the player a lesser power that can be used to designate most NPCs as a "Quest Giver". Any NPC that uses one of the standard voice types is a potential target for this power, including all of the potential followers other than those with a unique voice type. Once an NPC has been designated as a "Quest Giver" the player can ask them for one of three possible radiant quests.
1. Clear a Dungeon
2. Kill a Boss
3. Raid a Chest

The location of each quest is shown before the quest is accepted and the player has the opportunity to decline it and re-roll the dice so to speak. Also any active quest can be cancelled at any time by speaking to any "Quest Giver" NPC and telling them that "I don't want to complete the current quest". An offered quest can also be refused permanently, in which case it is added to a master list of rejected locations which will never be offered again. This list of rejected locations will also be used by the modified radiant quests referred to above.

Available on Nexus - http://www.nexusmods.com/skyrim/mods/62625/?