Yes, you can get lots of free bibles online. But in case those who specifically want an electronic version of the English Standard Version (ESV)
http://thegospelcoalition.org/blogs/justintaylor/2011/08/13/…
From the Crossway blog:
The ESV Student Study Bible was simultaneously published in print and online formats. The Online Student Study Bible is hosted through ESVBible.org and functions as a study module, similar to the formats of the ESV Online Study Bible and the Online Literary Study Bible. With notes, book introductions, maps, and specially written articles, it’s a portable, easy-to-use tool to compliment your free ESVBible.org account.
Normally on sale for $9.99, you can unlock the Online Student Study Bible for free by sharing it with five friends. Here’s how:
- Log in to your ESVbible.org account (or register for free)
- Click on the add content button at the top
- Click on “Student Study Bible Notes”
- Click on the “Invite 5 friends” link
- Submit 5 e-mail addresses and the Student Study Bible notes and resources will be unlocked – use and enjoy!
(I know, not really "Software".. Sorry)
Software version of ESV is generally free - I think that is the policy of Crossways. It is a smart way to promote use of the version and encourage sales of print copies.
ESV is free to download with eSword. There are also free ESV reader apps for Android and iOS.