Gimp tutorial on the text effects build in to GIMP. GIMP calls each text effect a logo. Will teach you how to put them in an image you’re working on.
Just some GIMP text effects, you can use this way are:
Alien glow text effect
Alien neon text effect
Blended text effect
Carved text effect
Chalk text effect
Chrome text effect
Comic book text effect
Cool metal text effect
Crystal text effect
Frosty text effect
Glossy text effect
Glowing hot text effect
Neon text effect
Circle text effect