As of this writing Hootsuite is down.
If you have a posting schedule backed up somewhere like Evernote, than no worries.
Why not go “old school” with your posts?
On a Facebook Page, just schedule the post by clicking on the clock icon.
For Twitter, there are too many desktop and web based scheduling tools to mention. Just do a search for “twitter schedule.” However, if you are a Twitter Advertiser, you can also schedule your tweets.