Silly French living in Korea, former VLC contributor.
Regarding EFL, I worked mostly on the following components, all in Evas:
- Evas GL (direct rendering, GLESv1, etc...)
- ETC1, ETC2, S3TC texture compression
- Text/Image filters
- Masking
I also contributed a lot to the EFL Interfaces aka. Unified API, on the path to EFL2.