A few days ago I pointed out that Arzoo.com does not have an option to search/buy One Way tickets. They silently fixed it.
Here is the broken version:
Response from Makemytrip and the update by Arzoo.com is promising. These companies are following blogs/media and working on the feedback provided.
User feedback is free QA
Update: I guess I posted the post too soon. Just found – searching for tickets from SFO to New Delhi redirects me to a blank page for both One way and Round Trip on Firefox 188.8.131.52 and WinXP.