You can purchase the NET Bible for e-Sword for $19.95. Here is a screen shot of what it looks like on e-Sword.
Here is what Bible.org says about their NET Bible translation.
After 10 years of work by 25 world class Bible scholars, the translation was completed in 2005 and is the single most important project the ministry has ever undertaken. Having our own translation allows us the freedom to give it away free to the world forever.
Here is a copy of the Preface to the NET Bible First Edition.