Asked on 07 Jun 2018
Apart from those that listed by Gabriel, there is also dollarDEX which is said to be of $0 Sale Charges, Switching Fees And Platform Fees. However, they do earn a portion of the annual management fee which is already embedded to the cost of the unit trust / fund. You can read more on https://www.dollardex.com/SG/index.cfm?current=/contents/faqearn&contentID=1767
As to "eroding costs" mutual funds (unit trusts) surely are to avoid.
better stay with passive indexing ETFs.
I personally prefer FSM as i find their rates very competitive.
Their improved web interface makes the user experience better and they are rather upfront on their cost.
Besides, they carry quite a wide range of funds, although they are more Asian-focused I feel.
Fund supermart is a good place to consider. As Warren buffett recommends. You might want to try an online brokerage to get Vanguard funds with a very low cost basis.
Adding onto what is being said, you can also consider modern ILPs. I've found significantly good ones with Manulife, AIA and AXA. Most people don't like ILPs, but most people also don't even understand how they work - the article by Dollarsandsense is grossly outdated and BudgetBabe's article on it shows that back in 2016, she didn't even understand the difference between a par fund and an investment fund.
...well this reply isn't for unnecessary shot firing...
There are certain advantages to modern ILPs because all the platforms listed by Christopher How - and don't get me wrong, they are good platforms and I offer them as well because I am an FA - have an Account Fee. For some ILPs, depending on structure and if you mess around with the NaR, you can actually cap your fees after some years and only pay the management fee of the mutual fund itself. So if your time horizon is extremely long I usually need about 20 -25years for this to be significantly effective, it might actually be better to use an ILP, especially if its in line with your long term goal.
Some people complain about liquidity and surrender charges, but the reality is that if you save for a goal the money should be for that goal. If you break from it, you're just undisciplined.
There are many platforms available so you have to compare the costs.
Most brokerages allow purchases of mutual funds/unit trusts. Just to list a few here:
Standard Chartered online trading