In celebration of their fifth birthday, the folks at Readdle are offering their most popular apps at 70 percent off their regular price.

Launched in 2007, Readdle created a new Web service to read documents on the first iPhone, which was one year before Apple launched the App Store. Following this, ReaddleDocs was born, followed by Scanner Pro, and PDF Expert, among others.

The following apps are currently on sale:

Be sure to check out two of our previous stories about Readdle products. These include: ReaddleDocs For iPad Jumps To v3.0, Making Numerous Additions To Nearly Every Area and Readdle’s Remarks App Gains Further Handwriting Enhancements And More.

What’s your favorite Readdle app?