Bangla Word (Bengali typing software)
Ekushey (Unicode Bengali keyboard manager, Bengali fonts)
LibreOffice (Multiplatform and multilingual free office suite. Bangla office documents can be produced by unicode typing.)
OmicronLab (Various bengali fonts, Bengali keyboard manager)
OpenOffice.org (Multiplatform and multilingual free office suite. For bangla version click here)
Society for Natural Language Technology (Unicode Bengali font, Baisakhi Linux)