foliostuff
Tools for traders, investors, and stock market enthusiasts.
The tools
Portfolio Visualizer
Plug in your tickers and allocations, get a clean chart you can actually screenshot and share without it looking terrible.
Cost Basis Calculator
Buying more? Selling some? See exactly what it does to your average cost before you do it.
Position Sizer
Tell it how much you're willing to lose, where you're getting in, and where you're bailing — it tells you how many shares to buy.
Good stuff around the web

TradingView
Advanced charting, real-time data, and trade ideas

FiscalAI
AI-powered financial research and earnings analysis

Finviz
Stock screener, heat maps, and market news

Fear & Greed Index
CNN's market sentiment indicator — from extreme fear to greed

How Many Trading Days
See how many trading days are left this year

Yahoo Finance Screener
Filter stocks by fundamentals, valuation, and performance