Today I learned that Saiya-Saiga has a ディスクレス field for all the visual novels listed on the site. The field essentially labels whether the release is encumbered by DRM or not; whether it performs a check to ensure the disk is in the drive on first startup.

If the developer has provided a DRM-removal patch, as in the case of August with Aiyoku no Eustia, that is also listed with a link to download it.

This should be very useful for players looking for DRM-Free releases.