Command-line translator using Google Translate, Bing Translator, etc.
Galgame's Multilingual Real-time Machine Translation Tool
(X)BNF simple and clever translation grammar compiler
LangDoc is a multi-lingual translator software
Natural Language Processing (NLP) for the Masses
Your graphical tool for Syntactic/Semantic Structure Analysis of texts
An Arabic collocation extraction tool
A Rule-based Part-of-Speech and Morphological Tagging Toolkit
Your language to speak with all.
Statistical phrase-based machine translation system
Virastyar is an spell checker for low-resource languages
A parallel corpora (bitext) aligning tool. Create TMX databases
To aid translation of satsangs of Paramhamsa Nithyananda
The open, easy-to-use and powerful translator app for Android
Substitution cipher toolkit (en/decryption + automatical cracking)
Complete tool for constructing/manipulating languages in digital form
Java API and tools for performing NLP and other AI tasks
Small Java program to compare two texts
A LaTeX library to draw all sorts of dependency trees and graphs
MyVocabtionary allows you to create an online dictionary for free!