To post to Twitter with no URL:
1) Log into dlvr.it
2) Edit your twitter account (rollover and click on edit/pencil icon)
3) Go to the 'Post Content' tab
4) Toggle the switch for "Post Link" to the 'Off' position
5) Select "Post Title" and/or "Post Body"
Tip for Advanced Users:
When posting Body, you may choose between Summary and Full Body content:
Check out dlvr.it's Twitter automation tool for free!