List of Historical Price Data Sources
Free or nearly free data
|| Free historical tick data for a range of instruments.
Duka is an open source downloading script
||lots of free data from numerous sources, mostly daily data|
||Blog post with a number of suggestions for 'URL hacking' stock data from a number of financial websites.|
||Free historical tick data on their contracts via their API - currently offline|
||(Python wrapper here)|
||IEX is an exchange and also provides free data for US stocks.|
|Interactive Brokers API||
Price history going back up to three years, in buckets down to 250ms. Not free, but very cheap for personal use.
Realtime data for a range of futures contracts. Probably pirated, proceed with caution..