I would like to know what tools/websites that folks use to evaluate options prices, trading, an potential profits/losses.
Most trading platforms will allow you to create and analyze mult-leg options positions. They're all kind of different and so its hard to say that any particular one is better than the other; usually its easiest to just go with what you already have (through your 401k or IRA or whatever) before creating new accounts.
FWIW, I use Fidelity, Tradestation, and E-trade.
Tradestation is my primary trading platform, as it is significantly more powerful than the other two, has way better charting functionality, way more functionality for setting up trades, and the pretty seamless futures/forex functionality means they're just another ticker in my watchlist. Its also the only platform where I can create my own indicators and automated trading scripts. (I've been working for a year or more on an automated get-rich script quanting the ES...I'll let you know <ahem> when it works. ). The downside is that I have to run it in a VM (on my MBP) with significant resources allocated, so its a bit of a chore if I'm looking to just do something quick. The web interface is great for bare bones quick stuff but is significantly less functional--like, I can't analyze options P/L, for instance. The mobile app is great too, easy to use and similar functionality to the web interface. Super easy to maintenance trade and pretty deep charting functionality.
Fidelity's platform (Active Trader Pro) is pretty solid too, though its a little slow on my MBP and freezes sometimes. Charting is a bit frustrating but overall the platform is great for an entry level trading platform. There are actually some indicators that prefer to use with Fidelity because they are easier to use than Tradestation, so I often have both platforms running at once. The options P/L tool is not quite as powerful as Tradestation, but does 95% of what the TS tool does and so I often just use the Fidelity tool. The web interface is crap, though there are some good research tools in there for equities/ETFs/Options--I have a few custom options scans that I use for finding volatility trades, for instance, and every few weeks I run an equities scan to see big institutional movers. Fidelity's app is a steaming pile, only made worse by the fact that faceid is somehow broken (honestly not sure if its just me--can't be bothered to check) so logging in is a PITA.
I didn’t spend much time on the e-trade platform before I uninstalled it. I didn’t find anything of differentiating value over the other two and if you're asking me it’s even odds whether the UI is newer or older than windows 95. The web app (power etrade, not the regular etrade) is actually really nice and easily the most powerful of the three. It’s the only one where you can analyze options, though I only use it in a quickie as the functionality isn't as deep as the other two platforms. The app is also great (again the power etrade app, not the regular one), and easy for maintenance trading, though I don't like the charting as much as TS.