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saas × 68web-apps × 12
crm × 7
open-source × 6
email × 5
web-services × 5
cloud-service × 5
gratis × 4
api × 4
time-management × 4
survey × 4
web-development × 3
ecommerce × 3
library × 2
software-development × 2
project-management × 2
chat × 2
calendar × 2
scheduling × 2
forms × 2
hosted × 2
documentation-generator × 2
facebook × 2
social-networks × 2
authentication × 2