I've had a few people ask about my Midnight theme for TextMate, a preview of which can be found on TextMate Themes. I've updated a few things with it since it was originally uploaded to TextMate Themes, and since I can't really provide updates there, I've provided it here as a free download. Feel free to try/use it if you'd like. It's tailored for use with HTML, CSS, PHP, and Python, but should work well with (or be easily adapted to) other languages. I strongly doubt it will bork anything on your system (I've used it for years now.), but as with anything you download from the internet, use it at your own risk. I don't provide any sort of guarantee or warranty.
More coming soon ...