Zoho Planner is a service I wrote about this past April that was a very useful way to get organize and plan out your schedule and activities. It allowed you to create to-do lists, notes, upload images and files add email reminders and access your data anywhere.
I just received a notice from Zoho that they are shutting down Zoho Planner. The full notice can be seen below. Planner will remain online until December 31st 2012 but will switch to read only soon. Users will need to back up their data before the end of the year when all data will be erased. Zoho has a support site and email available and reminds users that they can use Zoho Calendar, Wiki and Tasks to replace Zoho planner.
You can also use Google's many services and Evernote to get organized and replace Zoho Planner.
See links to other services and the full shut down notice below.
Zoho - suite of on-line business, productivity & collaboration apps
Alternatives to Google's web services and apps
Google for Educators Resources
Evernote for Educators Resources