The सूत्रपाठः page lists all the 4000 sutras of अष्टाध्यायी, along with the vartikas in them. The salient features of this listing are as follows —
Each sutra is associated with its unique number in the अष्टाध्यायी order and also in the सिद्धान्तकौमुदी order.
The sutras can be re-ordered either using the सिद्धान्तकौमुदी or the alphabetical ordering using the left menu.
The searchbar on the top can be used to search for sutras either in Devanagari or in Roman script. For example, try the query यणचि or yaNachi. The searchbar also understands the sutra number, like 3.1.91 or the Siddhanta-Kaumudi number, like 2829. It also understands devaganari-input like ३.१.९१ or २८२९.
Each sutra is clickable and will take the user to the detailed commentary of that sutra. This includes the पदच्छेदः, अनुवृत्तिः, अधिकारः, सूत्रार्थः and various commentaries like काशिका, न्यासः, पदमञ्जरी, सिद्धान्तकौमुदी, बालमनोरमा, तत्त्वबोधिनी, प्रौढमनोरमा, लघुशब्देन्दुशेखरः, लघुसिद्धान्तकौमुदी, सुधा टीका and महाभाष्यम् । Other features the individual sutra page are —
The audio-icon next to the sutra, which shows the error-free and precise pronunciation of the sutra.
The arrows next to the sutra numbers on the left and right, which can be used to browse the sutras in either the अष्टाध्यायी order or the सिद्धान्तकौमुदी order.
The left menu (hidden by default), which shows the list of all ~4000 sutras with the current-sutra shown highlighted.
The "anchor" symbol next to each sutra-reference in all the commenatries, which opens up the left menu and shows the location of that sutra in the Ashtadhyayi order.
The "square-with-arrow" symbol present next to the names of certain commentaries, which takes the user to the location of the current sutra in these respective commentaries.
A quick demonstration of these features can be seen here.