fix: add examples

docs/examples.mdx

@@ -6,16 +6,49 @@ description: Examples build with Sapphire
 
 ## Randomness
 
-(link to repo with an randomness dapp)
+:::info Example Oasis Swag Wheel
 
-## Gasless Voting
+[Example dapp][rng-example] which uses onchain RNG to determine which Swag a participant wins.
 
-(link to gasless voting dapp)
+:::
+
+## Confidential Voting
+
+:::info Example VoTEE
+
+[Voting example][voting-example] to vote for the favorite Oasis mascot, see also [voTEE.oasis.io].
+
+:::
+
+:::info Example Blockvote
+
+[Example][voting-example] for general confidential and gasless voting, see also [vote.oasis.io].
+
+:::
 
 ## SIWE
 
-(link to siwe demo dapp)
+:::info Example SIWE
+
+Sign in with Ethereum (SIWE) [example dapp][siwe-example].
+
+:::
 
 ## Onchain signing
 
-(link to onchain signer dapp)
+:::info Example Onchain signing
+
+Onchain transaction generation and signing [example][onchain-signer].
+
+:::
+
+Find more examples on [playground.oasis.io].
+
+[rng-example]: https://github.com/oasisprotocol/demo-oasisswag
+[voting-example]: https://github.com/oasisprotocol/dapp-blockvote
+[vote.oasis.io]: https://vote.oasis.io
+[votee-example]: https://github.com/oasisprotocol/dapp-votee
+[voTEE.oasis.io]: https://votee.oasis.io
+[siwe-example]: https://github.com/oasisprotocol/demo-starter/tree/matevz/sapphire-paratime-2.0
+[onchain-signer]: https://github.com/oasisprotocol/sapphire-paratime/tree/main/examples/onchain-signer
+[playground.oasis.io]: https://playground.oasis.io