If you depend on voice-to-text dictation for your day-to-day work you miss this feature badly in Ubuntu. In Windows 7 you can either use the inbuilt dictation feature that is bundled with the operating system or you can use a highly efficient dictation software called Dragon NaturallySpeaking from Nuance. DNS is available for both Windows and Mac (even for mobile devices) but sadly it is not available for Ubuntu.
There are many people who are able to run Dragon NaturallySpeaking by installing Wine in Ubuntu (it creates a parallel Windows environment within Ubuntu) but it rarely works and requires lots of knowledge of Linux-based commands.
Another option is installing VirtualBox, then installing Windows in it and then installing DNS in it. Whether you use Wine or VirtualBox there is a more than 90% chance that you’re not going to be able to dictate in Ubuntu. Since Canonical seems nowhere near to developing a dictation feature for Ubuntu and neither Nuance is showing any interest, are you stuck with Windows, especially when you cannot do without dictation?
This Online Dictation tool can help you. It is nowhere near Dragon NaturallySpeaking or even the Windows inbuilt dictation feature, it is better than having nothing. If you speak slowly and clearly, you can achieve a greater level of efficiency and accuracy. Unlike DNS it doesn’t learn from your speaking patterns and it doesn’t even have a dictionary but if you cannot manage without dictation and you are hell-bent upon using Ubuntu then so far it is your best voice-to-text dictation solution for the Linux environment.