Timeless Timber is reclaimed wood. There are many companies that offer many variations.
Lake Salvage usually refers to the logs that were submersed in the great lakes. I believe originally it was just Lake Superior, but now companies have found wood in all of the great lakes. Advantages of the wood would be the very tight growth rings.
Kielwood® is the new generation of pool cue wood, specifically created for low deflection. It is a dark, hard rock maple that is harmonically stabilized for straightness. With traditional pie shaped shafts, each slice of the pie is susceptible to having a different reaction. (From the Prather website)
Bowling Alley, is just that. Reclaimed wood from bowling ally lanes. Personally I never thought of using it for cue shafts, I bought about 20 feet of it for my shop benches.