Uses data from Wiktionary to generate dictionary files that can be used offline. These can be downloaded from within the app.
Use the long-press menu of a word to have your device's text-to-speech implementation speak it for you (you may need to install text-to-speech data for the language first).

Note: I am not the original author but I took over maintenance of the original QuickDic app.

Source code is available here: https://github.com/rdoeffinger/Dictionary but little documentation (in the readme.txt) so far.

The adventurous can choose to get the beta version here if you want to follow development more closely: https://play.google.com/apps/testing/de.reimardoeffinger.quickdic