I recently (and finally) took the time to investigate the NET Bible. It is a modern, excellent translation that was designed to be shared free of charge over the internet.
In my opinion, the best part about the NET Bible is the over 60,000 translation notes. Since the text is in electronic format, the notes are very easily accessible.
As an example, below is the NET Bible note on Acts 8:37:
A few later
I found this note very helpful because Acts 8:37 is a verse some translations have (KJV, NKJV), while others do not (ESV, NIV). Additionally, it is a verse that is doctrinally significant because of what is says about baptism.
To download the NET Bible, go here.