A Complete Record of Open-source Programs for Online Albums

Many friends who like taking photos have asked me how to build an independent photo album website. I recommended they create their own blogs, but it seems they are not very interested in writing and uploading stuff; they just want a photo album. So, I thought about gathering all these open-source photo album systems. There are also many similar articles online, but they don't seem to be very comprehensive. Here, I believe I've gathered almost all the mainstream open-source web-based photo album source codes, and now I'm sharing them with everyone.