These are links to various online Bibles and Bible tools. All of them are outstanding and I use them myself. As to which translation of the Bible to read, any of the most commonly available [ie, King James, New King James, NIV, NASB] are just fine for study. Even the paraphrased bibles are great for a different perspective or for light reading.

Bibles
The Online Study Bible — #1 in my opinion
World Wide Study Bible — with Apocrypha
RSV Bible — with Apocrypha
Blue Letter Bible
Bible Gateway — 16 translations; 29 languages
The Unbound Bible
Interlinear Bible — Greek or Hebrew


Bible Study Tools
Matthew Henry Commentary
Jamieson, Fausset, Brown Commentary
Nave's Topical Bible
Torrey’s Topical Textbook
Christian Classics Ethereal Library
Smith’s Bible Dictionary
Hitchcock's Bible Names Dictionary
An End Times Glossary of Terms
The Writings of Flavius Josephus
Goshen — Index to Bible Study on the Web