There are a number of online translation tools that you might want to use to assist your translation projects. Being online they allow you to work from anywhere, it also allows many people to participate without having to install software or configure a PO editing tool.
As the developers of Pootle we are happy to see that the idea of online translation has become more popular since we originally gave Pootle to the world.
These are some tools of which only some are still available. The others are kept for historical reference.
An important issue for these is the extent to which they allow offline translation, access control and quality assurance.