PReVo

Esperanto dictionaryGPL-2.0-only

Senreta Vortaro

Simple, offline English-Esperanto dictionaryApache-2.0

AnySoftKeyboard: Esperanto

Language pack for AnySoftKeyboardApache-2.0

RHVoice - a free and open source speech synthesize

TTS engine with extended languages support (incl. Russian)GPL-3.0-or-later