A project can probably use the EUPL instead of the AGPL (EUPL is to AGPL, as MPLv2[0] is to GPL). Basically, EUPL is file-based, not project based, and so it is not aggressively viral. You can use the EUPL code any way you want, as long as you make the original code available, plus any modification to the original files.

[0]: With Exhibit B, which prevents relicensing to GPL. It is also analogous to CDDL.