By Myrilandell of Lothar

QuestSpamFilter was chosen as a "Pick of the Week" on WoWInterface! This is a huge honor, thank you!

QuestSpamFilter is an addon that consolidates the "quest sharing" information from 20 lines of quest sharing spam into condensed summaries. In other words, QuestSpamFilter turns this
Sharing quest with Person1.
Person2 has completed that quest.
Person3 is already on that quest.
Person4 is not eligible for that quest.
Person5's quest log is full.
Person6 is already on that quest.
Sharing quest with Person7.
Person8 is already on that quest.
Person9 has completed that quest.

into this
2 Completed: Person2, Person9
1 Not Eligible: Person4
1 Questlog Full: Person5
3 Already On: Person3, Person6, Person8
2 Sharing ...: Person1, Person7

QuestSpamFilter is localized for all languages (English (enUS), British English (enGB), Spanish (esES), Latin American Spanish (esMX), German (deDE), French (frFR), Russian (ruRU), Chinese (zhCN), Traditional Chinese (zhTW), and Korean (koKR)), though some are better than others, due to feedback :). If your localization isn't perfect, give me a better translation (located in qsf_translations.lua).