Add ecosystem program examples section (#1587)

Author: mikemaccana

apps/docs/content/docs/en/programs/examples.mdx

@@ -20,7 +20,9 @@ example programs within them:
 
 - [Basics](#basics)
 - [Tokens](#tokens)
-- [Token 2022 (Token Extensions)](#token-2022-token-extensions)
+- [Token Extensions (Token 2022)](#token-extensions-token-2022)
+
+There are also [ecosystem program examples](#ecosystem-solana-program-examples)
 
 ## Basics
 
@@ -61,7 +63,7 @@ interact with them in programs.
 | [Transfer Tokens](https://github.com/solana-developers/program-examples/tree/main/tokens/transfer-tokens)       | Shows how to transfer SPL token using CPIs into the token program.                                 | Anchor, Native |
 | [Token-2022](https://github.com/solana-developers/program-examples/tree/main/tokens/token-2022)                 | See Token 2022 (Token extensions).                                                                 | Anchor, Native |
 
-## Token 2022 (Token Extensions)
+## Token Extensions (Token 2022)
 
 Token 2022 is a new standard for tokens on Solana. It is a more flexible and
 lets you add 16 different extensions to a token mint to add more functionality
@@ -78,3 +80,12 @@ to it. A full list of the extensions can be found in the
 | [Not Transferable](https://github.com/solana-developers/program-examples/tree/main/tokens/token-2022/non-transferable)           | Useful for example for achievements, referral programs or any soul bound tokens.                                  | Anchor, Native |
 | [Transfer fee](https://github.com/solana-developers/program-examples/tree/main/tokens/token-2022/transfer-fee)                   | Every transfer of the tokens hold some tokens back in the token account which can then be collected.              | Anchor, Native |
 | [Transfer Hook](https://github.com/solana-developers/program-examples/tree/main/tokens/token-2022/transfer-hook)                 | Four examples to add additional functionality to your token using a CPI from the token program into your program. | Anchor         |
+
+## Ecosystem Solana program examples
+
+Third parties often maintain their own libraries of example Solana programs.
+These are maintained by the providers rather than by Solana Foundation.
+
+- [Quicknode's Solana Program Examples](https://github.com/quicknode/solana-program-examples)
+  provides additional programs, particularly for financial software, for both
+  newer Anchor versions and the Quasar framework.