Listed below are all the common tools I frequently use.
Money Flows, sometimes the market up huge with very negative money flow or down huge with very positive money flow, either cases are suspicious. I watch this site daily to make sure it's a real up or down.
ISEE Index, check ISEE tag, I have lots of posts related to the ISEE index.
CBOE Put/Call Ratio, the realtime put/call ratio provided by stockcharts.com is always wrong, so I'd like to check here to calculate the real put/call ratio manually.
Moon Phases, New Moon and Full Moon sometimes are pivot date.
Solar Term, all solar term dates could be pivot date as per Gann Theory.
The Pattern Site, this is where I get all the pattern related statistics, including Candlestick pattern.