<a href="http://www.kibot.com">www.kibot.com</a> - bid/ask, some tick data, no volumes for FX
www.tickdatamarket.com/forex.php – pricy €280 per currency pair
www.quandl.com/collections – general economic data, some stocks, daily at best
datacatalog.worldbank.org and data.worldbank.org – world bank open data
www.fxdd.com/us/en/forex-resources/forex-trading-tools/metatrader-1-minute-data – meta trader format
http://www.histdata.com/download-free-forex-data/?/ascii/1-minute-bar-quotes – CSV
www.trading-tools.com/index.htm – data downloader, eod only, $59+
www.stockhistoricaldata.com/daily-download – either manual or via xls plugin, takes eod from yahoo
eoddata.com/products/default.aspx – free eod 1 min ohlc, but only 30 days, other not expensive
www.csidata.com – source for yahoo it seems – no fx
quantquote.com/historical-stock-data – stocks only
www.netfonds.no/quotes/paperdump.php?paper=EURUSD.FXSB – free eod only
knoema.com/atlas – all sorts of data including some economics
www.dukascopy.com/swiss/english/marketwatch/currency_index – 1 min fx ohlcv
stooq.com/db/h – 5 min fx no vol data also equities
www.fxhistoricaldata.com/EURUSD – hourly data fx, no volume, free but limited pairs
www.histdata.com/download-free-forex-data/?/ascii/1-minute-bar-quotes – lots of zip files but no volume