These are some great on-line aids for studying the Hebrew Bible:
2LetterLookup, Tyndale House (all biblical languages)
STEP, Tyndale House (Bible analysis resource)
Here are SBL Hebrew-font and keyboard software to enable you to write BH Hebrew vowels and cantillation signs on your (PC) computer, as well as some useful applications for learning/reinforcing Hebrew. Enjoy!
Here are downloadable and free Bibles for mobile phones in various (modern) languages.
Also check out this post about a Hebrew & Greek Bible I find very useful.
Finally, don’t miss Olive Tree for many Bible resources for iPhone, iPad and Android. Hebrew Old Testament, Greek New Testament, the ESV Bible and many more are free.