Google Is Shutting Down Picasa In Favor of Photos (engadget.com)
Google has been steadily migrating its resources towards the Photos ecosystem since the company first announced it at last years I/O developers conference. Today, Google announced that it will shut down Picasa. Starting May 1st, Google will start phasing out Picasa from its product lineup, moving over to Google Photos.
Photo organizers, locally installed, Windows:
Zoner Photo Studio
xnView
Nero Mediahome
Windows Live Photo Gallery
Media Pro (Not Freeware)
ACDSee (Not Freeware>
Corel Aftershot (Not Freeware)
Photo editors, browser based:
Pixlr
Polarr
Fotor
iPiccy
Image Hosting:
Piwigo (free to self-host; first party hosting available)
Zenphoto (free to self-host; third party hosting available)
JuiceBox (freemium; self-hosted only)
Flickr
Amazon Prime Photos (you have to be Prime)
Okay, I'm tired of adding links...but depending on what functions of Picasa you're looking to replace, there are plenty of alternatives.
I think you meant digiKam, not digicam?