Hercules log most events.
I think no special tool for log analysis, but sql can works like basic analysis tool.
For insert card logged card delete, then insert event
My logs configuration:
// Enable Logs? (Note 3)
// 0x00000 - Don't log at all
// 0x00001 - (T) Log trades
// 0x00002 - (V) Log vending transactions
// 0x00004 - (P) Log items drop/picked by players
// 0x00008 - (L) Log items drop/looted by monsters
// 0x00010 - (S) Log NPC transactions (buy/sell)
// 0x00020 - (N) Log Script transactions (items deleted/acquired through quests)
// 0x00040 - (D) Log items stolen from mobs (Steal/Gank)
// 0x00080 - © Log player-used items (consumables/pet&hom&merc food/items used for skills&attacks)
// 0x00100 - (O) Log produced/ingredient items
// 0x00200 - (U) Log MVP prize items
// 0x00400 - (A) Log player created/deleted items (through @/# commands)
// 0x00800 - ® Log items placed/retrieved from storage.
// 0x01000 - (G) Log items placed/retrieved from guild storage.
// 0x02000 - (E) Log mail system transactions.
// 0x04000 - (I) Log auction system transactions.
// 0x08000 - (
Log buying store transactions
// 0x20000 - (K) Log account bank transactions
// 0x10000 - (X) Log all other transactions (rentals expiring/inserting cards/items removed by item_check/
// rings deleted by divorce/pet egg (un)hatching/pet armor (un)equipping/Weapon Refine skill/Remove Trap skill)
// Example: Log trades+vending+script items+created items: 1+2+32+1024 = 1059
// Please note that moving items from inventory to cart and back is not logged by design.
And it doesn't log any insert/extract card to weapon or any armor item