This study aimed to compare the effect of using web 2.0 writing tools blogs to wikis on developing third preparatory students’ English language writing skills. A two-group experimental design was used: the first experimental group studied through the blog application while the second one studied through the wiki application. The sample consisted of 30 students, fifteen of them were in the first experimental group, and the others resembled the second experimental one. The sample was randomly contributed to the both groups. The research instrument was a writing skills test to measure students’ writing skills. T-Test was used to compare between the two groups and to determine the significance of the differences. Findings revealed the effect of the two writing tools blogs and wikis on developing third preparatory students’ writing skills and there is no significant difference between blogs and wikis.