abiword is in extras-devel.
Be careful! Extras devel is evil. It can really cause problems with your device. disable the repo after installation if you don't know what you are doing! There also non optified packages around there (they need a lot of space at the wrong partition and cause problems).

By the way:
There is also freoffice (Koffice) and it is not in extras-devel. It can also handle presentations and spreadsheets.