[Disclosure: For all of the firms in tier one (and some in tier two and three) I know the CEO, CTO and the guys at the coalface doing the work. As such, this post will respect the policy of no "naming and shaming" for this blog. Comments will be moderated if they fail to respect that policy.]
- FIX8 - website mentions testing but not well documented
- DDR Applications DFIX. Website looks like a work-in-progress
- Ullink via acquiring NYFIX also acquired the TransactTools business and ttCert.
- Cap Gemini FIX Protocol Testing Accelerator - The website looks untouched since 2010 and refers to Aegisoft as an independent firm.
- GoodCore Software FIX Simulator - Website was written by a non-native English speaker and has not been updated since 2013.
- FIXSol NINTEI - Website was written by a non-native English speaker and has not been updated since 2013.
- FIXimulator - FIX simulator - website untouched since 2009. By Zoltan Feledy.