Fidelity
- FXNAX
- US Bond Index Fund
Vanguard
- VMMXX
- Prime Money Market Fund. Equivalent to "money market" bank account but w/out FDIC insurance. Currently 2.49% interest, rates adjusted quickly.
- VTSNX
- Total International Stock Index Fund.
- VINIX
- Institutional Index Fund. US-based of the above.
Schwab
- SWWXX
- Schwab AMT Tax-Free Money Fund.Earnings incur no federal income tax.