Concussion grenades are a weapon usually used by the Starfleet's marine forces and the Dominion. Once thrown and activated, they were capable of eliminating anything within their blast radius. (ST video game: Away Team)
The Bajorans used concussion grenades against the Cardassians during the Occupation of Bajor. (DS9 novel: Cathedral)
In 2375, the Jem'Hadar who discovered the location of Kira Nerys, Elim Garak and Corat Damar threw a concussion grenade into the basement of Enabran Tain's home after killing Mila. It stunned them, allowing the Jem'Hadar to capture them. The Liberation Front later used concussion grenades to breach the cargo bay door of Dominion Headquarters. (DS9 novelization: What You Leave Behind)