With the exchange traded funds industry continue to boom, various brokerage houses are racing to get in on the action.

A popular tactic for capturing ETF assets from registered investment advisors, financial planners and retail investors has been to offer menus of ETFs on a commission-free basis. Not only have brokers such as Charles Schwab (SCHW), Fidelity and TD Ameritrade (AMTD) offered select ETFs to clients sans commissions, the firms have routinely boosted the number of ETFs clients can access without commissions.

In 2014, we examined Fidelity’s and Schwab’s commission-free ETF lineups in an effort to unearth some of the most well-known ETFs on each platform.

In September, Schwab added 65 from various issuers to Schwab ETF OneSource, bringing the number of commission-free offerings on the platform to 182. Seven ETF providers — ALPS, Direxion Investments, Global X Funds, IndexIQ, PIMCO, ProShares and WisdomTree (WETF) – joined OneSource. [Popular ETFs on Schwab OneSource}

Today, we highlight some of the well-known ETFs investors can access without commissions on TD Ameritrade.