Some more...

Co-writer required to help out with existing script
http://www.mandy.com/job_view.php?v=66330250
Source - Mandy

Screenwriter sought
https://www.upwork.com/jobs/screenwriter_~01c5127cdd8b1822a4?source=rss
Source - Upwork

Script writer required for feature
https://www.upwork.com/jobs/Script-writer_~01345ef01ee7736b94?source=rss
Source - Upwork

Co-writer sought for TV series
http://losangeles.craigslist.org/lac/wrg/5353324392.html
Source - Craigslist

Comedy writers needed
http://losangeles.craigslist.org/lac/wrg/5353049542.html
Source - Craigslist

Indie producer seeks low budget feature
http://losangeles.craigslist.org/wst/wrg/5352881115.html
Source - Craigslist

Writer needed for Irish set period piece
http://boston.craigslist.org/gbs/wrg/5352779033.html
Source - Craigslist

Seeking writer for childrens animated feature
https://www.stage32.com/jobs/488851/Screenwriter-for-Childrens-Animated-Feature
Source - Stage 32

Anthony