Lingvosoft provides Latin translation software for Windows and PocketPC. You can download trial versions, to see what works best for you. The software packages fall into these basic categories:

• Latin Talking Dictionary (just under $50). This is what most people are looking for. Load this on your machine, and you have a virtual translation device. It delivers instant bi-directional translation of all the words and phrases in its massive database.
  More info: PalmOS version | Windows version
   

• Latin Non-talking Dictionary (under $40). Load this on your machine, and you have a virtual translation device. It delivers instant bi-directional translation of all the words and phrases in its massive database.
  More info:  PalmOS version | PocketPC version
  
   

• Latin Picture Dictionary for Pocket PC (just under $40). The Ectaco KwikPoint program is an effective and easy to use system for getting your ideas across–silently! Featuring more than 600 universally recognized symbols, it helps you communicate in many different situations without speaking a single word. It  lets you communicate your needs concerning dining, lodging, transportation, and other commonly encountered situations with a minimum of effort. Simply select the picture you want and show it to your waiter, hotel clerk, bus driver, or even your new best friend. Providing essential travel tools for your personal and professional needs, it allows you to interact with the people you meet on your trip abroad and to be understood! Make new friends and enhance your travel experiences now with this user-friendly communication tool for the whole family! More info