Are you wanting tools to suggest to you an asset allocation and then a selection of Magic Funds?
Do you want to do data mining of past performance and select a carefully chosen set of past performers? Try www.portfoliovisualizer.com
I don't think any tool can predict the future very well, so you have just rough it and go with the flow. For instance, you have basically two choices for asset allocation I think:
1. Total market weights which at bogleheads.org is considered the "3-fund portfolio". You get to pick the percentages of Total US Stock Index, Total International Stock Index, and Total US Bond index. Vanguard LifeStrategy and Target Retirement funds are variations of this kind of portfolio, so you can just copy them.
2. Small-cap and value-weighted portfolios. Betterment, Wealthfront, DFA advisors and some others advocate these kinds of portfolios. One starts with something like the Portfolio 1 (see above) and then adds US small-cap value and foreign small-cap funds.
One simply adjusts the ratio of equities to fixed income to arrive at a portfolio that satisfies your ability to take risk, need to take risk, and willingness to take risk (as discussed by Larry Swedroe).
Other than that, it is all about how much you can save and invest during the accumulation phase and how much your expenses are in the decumulation phase.
Pretty simple I think. No magic to be seen anywhere.