First up on Steam you've got the entire Star Wars library's prices dropped by up to 77%. You can opt to buy different bundles, such as the 'Star Wars Collection' that includes the Jedi Knight games, KotoR 1 and 2, and more; or there's the 'Star Wars X-Wing Bundle' which has the newly-added X-Wing and TIE Fighter (1998 'Special Editions') games at 10% off.
You can also just head on over to the sale page and pick out individual games too, if you have more specific games in mind.
Steam's sale runs until 6th May.
Star Wars: Rebel Assault I & II, plus Star Wars: Jedi Knight II - Jedi Outcast, and Star Wars: Jedi Knight - Jedi Academy have now been added to GOG too.
GOG are also hosting some Star Wars themed livestreams on their Twitch channel. There's one on tonight (Thursday) at 8pm GMT (4pm EDT / 1pm PDT), where they'll be playing Star Wars: Republic Commando. For more info on the sale and Twitch streams head over here.
GOG's sale runs until May 7th, 6:59 AM GMT.