Industrialized countries indices:
- MSCI World
- FTSE Developed
Developed + emerging markets indices:
- MSCI All Countries World Index (ACWI)
- FTSE All-World
Whether to include emerging markets is a matter of taste. Various fund companies then offer funds on these indices: Lyxor, iShares, X-Trackers, ...
However, since they track the same index, it is more like Coca Cola and Pepsi Cola. You can make a religious war out of it or accept that it is basically the same thing. The same applies to the broker. Direct banks have now caught up well on prices and partially offer free savings plans, e.g. ING. It's a bit cheaper with the neobrokers like Trade Republic, Scalable, Smartbroker. But here too, it's more of a third-order optimization.