BPBible has many of the features you would expect in a Bible application – Bible, Commentary, and Dictionary support, Bible Search, Scripture tooltips, etc.
Cross verse searching
BPBible uses a proximity based search, rather than just a verse-based search. This means that a search can cross verse boundaries, giving a more natural search. It also supports regular expressions and phrases.
BPBible is licensed under the GPL (version 2) and is absolutely free.