Phototheca is a free photo organizing software makes it easy to view, sort, and organize photos. You can tag your photos with keywords, put into albums, and view on calendar. Phototheca detects duplicates for you. You can import all your folders with photos, and if duplicates exist. Move such photos into a safe, protect with a password and photos become invisible in the Library. Open safe when would like to bring photos back and don't worry about opened safe after application is closed all safes become closed automatically as well.