Links:

Archipelago Holdings, Inc. (Site Rating: 0. Rate It!)
Order entry and execution system for Nasdaq and listed stocks. Features include anonymous access to all displayed Nasdaq market participants, SmartBook TM proprietary execution algorithm.

Bloomberg Tradebook (Site Rating: 0. Rate It!)
Institutional access only from Bloomberg terminal through B-Trade Services. Recent expansion deal with Credit-Lyonnais.

Brut (Site Rating: 0. Rate It!)
Covers the Nasdaq market providing proprietary access to trading liquidity.

Domestic Securities, Inc. (Site Rating: 0. Rate It!)
An order display alternative to the traditional market making price quote system on the Nasdaq.

Inet ATS, Inc. (Site Rating: 0. Rate It!)
Includes a Java applet demo displaying the order book in real time.

InstaQuote (Site Rating: 0. Rate It!)
Trading platform providing live streaming market data, point and click analytics and direct order routing for the domestic and international trader.

Instinet, LLC (Site Rating: 0. Rate It!)
One of the largest brokers in the electronic markets. Recent link up with virt-x exchange in the UK.

Intelligent Markets (Site Rating: 0. Rate It!)
An institutional marketplace for the trading of illiquid instruments. Currently offering trading in convertible bonds.

ITG Europe (Site Rating: 0. Rate It!)
European crossing network. Orders can be entered manually, imported from a trade order management system or loaded via an Excel spreadsheet. Accepts orders via email for forwarding to POSIT. Sales traders will accept orders via phone calls or fax.

Marco Polo Network, Inc. (Site Rating: 0. Rate It!)
Online equity trading network linking developed countries of the world with emerging markets.