Many Twitter applications have suffered lengthy periods of downtime recently, a situation that has some developers concerned about the company's platform stability.

These developers, who have invested effort and money in building revenue-generating Twitter applications, are hoping Twitter figures out a way to increase the application platform's uptime.

"I am pretty disenchanted with Twitter at the moment," said Paul Kinlan, creator of, an application that automatically adds contacts to Twitter users' "following" list whenever other users post messages containing certain keywords.

As a result of the extensive downtime, Kinlan had to issue refunds to unhappy clients who pay him a fee to use the more advanced version of, which also has a free edition.