Proprietary software vendors may (if they can afford it) use CAT or TM software in order to ensure the consistency of their applications' terminology. Unfortunately, there are many different software vendors who are not willing to share their knowledge (which includes translation memory databases) with the others.
And this is where the open source software could prove to be better than the proprietary. It could, but is not. Although everybody has full access to the translations of many open source programs, this opportunity is hardly ever used. The knowledge of hundreds (if not thousands) of people translating applications into their native languages is not centralized and thus hardly available to the others. This is the reason why the translations of even the most popular programs are not consistent with each other, which discourages people from using them.
I'd like the Open-Tran.eu service to fill this gap and to provide the translators with a useful tool, which may improve the quality of their translations and increase the consistency of terminology in the open source software.