BasicCAT is a free and open source computer-aided translation tool. We can use it to translate documents, web pages, tables, slides and so on with features like translation memory, machine translation and terminology management.
ImageTrans is a computer-aided image translation tool. We can use it to translate comics, manga, posters, etc.
Aligner is a bi-text alignment tool. It can extract text from documents, tables, subtitles and align the text in sentence level automatically with manual adjustment support. It can export the bi-text to translation memory files for other tools to use.
TMXSearch is an online application for translation memory concordance.