| SRFI-0: | Feature-based conditional expansion construct | [13 implementations] |
| SRFI-1: | List Library | [13 implementations] |
| SRFI-2: | AND-LET*: an AND with local bindings, a guarded LET* special form | [12 implementations] |
| SRFI-4: | Homogeneous numeric vector datatypes | [8 implementations] |
| SRFI-5: | A compatible let form with signatures and rest arguments | [4 implementations] |
| SRFI-6: | Basic String Ports | [13 implementations] |
| SRFI-7: | Feature-based program configuration language | [5 implementations] |
| SRFI-8: | receive: Binding to multiple values | [14 implementations] |
| SRFI-9: | Defining Record Types | [14 implementations] |
| SRFI-10: | Sharp-Comma External Form | [4 implementations] |
| SRFI-11: | Syntax for receiving multiple values | [7 implementations] |
| SRFI-13: | String Library | [7 implementations] |
| SRFI-14: | Character-Set Library | [8 implementations] |
| SRFI-16: | Syntax for procedures of variable arity | [8 implementations] |
| SRFI-17: | Generalized set! | [7 implementations] |
| SRFI-18: | Multithreading support | [6 implementations] |
| SRFI-19: | Time Data Types and Procedures | [4 implementations] |
| SRFI-21: | Real-time multithreading support | [1 implementation] |
| SRFI-22: | Running Scheme Scripts on Unix | [7 implementations] |
| SRFI-23: | Error reporting mechanism | [11 implementations] |
| SRFI-25: | Multi-dimensional Array Primitives | [6 implementations] |
| SRFI-26: | Notation for Specializing Parameters without Currying | [8 implementations] |
| SRFI-27: | Sources of Random Bits | [7 implementations] |
| SRFI-28: | Basic Format Strings | [9 implementations] |
| SRFI-29: | Localization | [3 implementations] |
| SRFI-30: | Nested Multi-line Comments | [7 implementations] |
| SRFI-31: | A special form for recursive evaluation | [7 implementations] |
| SRFI-34: | Exception Handling for Programs | [6 implementations] |
| SRFI-35: | Conditions | [4 implementations] |
| SRFI-36: | I/O Conditions | [3 implementations] |
| SRFI-37: | args-fold: a program argument processor | [5 implementations] |
| SRFI-38: | External Representation for Data With Shared Structure | [6 implementations] |
| SRFI-39: | Parameter objects | [9 implementations] |
| SRFI-40: | A Library of Streams (deprecated) | [5 implementations] |
| SRFI-41?: | Streams | [0 implementations] |
| SRFI-42: | Eager Comprehensions | [5 implementations] |
| SRFI-43: | Vector Library | [6 implementations] |
| SRFI-44: | Collections | [0 implementations] |
| SRFI-45: | Primitives for expressing iterative lazy algorithms | [5 implementations] |
| SRFI-46: | Basic Syntax-rules Extensions | [0 implementations] |
| SRFI-47: | Array | [3 implementations] |
| SRFI-48: | Intermediate Format Strings | [4 implementations] |
| SRFI-49: | Indentation-sensitive syntax | [0 implementations] |
| SRFI-51: | Handling rest list | [1 implementation] |
| SRFI-54: | Formatting | [1 implementation] |
| SRFI-55: | require-extension | [6 implementations] |
| SRFI-57: | Records | [2 implementations] |
| SRFI-58: | Array Notation | [1 implementation] |
| SRFI-59: | Vicinity | [5 implementations] |
| SRFI-60: | Integers as Bits | [8 implementations] |
| SRFI-61: | A more general cond clause | [7 implementations] |
| SRFI-62: | S-expression comments | [6 implementations] |
| SRFI-63: | Homogeneous and Heterogeneous Arrays | [5 implementations] |
| SRFI-64: | A Scheme API for test suites | [0 implementations] |
| SRFI-66: | Octet Vectors | [5 implementations] |
| SRFI-67: | Compare Procedures | [3 implementations] |
| SRFI-69: | Basic hash tables | [7 implementations] |
| SRFI-70: | Numbers | [2 implementations] |
| SRFI-71: | LET-syntax for multiple values | [2 implementations] |
| SRFI-72: | Simple hygienic macros | [1 implementation] |
| SRFI-74: | Octet-Addressed Binary Blocks | [1 implementation] |
| SRFI-78: | Lightweight testing | [3 implementations] |
| SRFI-86: | MU and NU simulating VALUES & CALL-WITH-VALUES, and their related LET-syntax | [0 implementations] |
| SRFI-87: | => in case clauses | [2 implementations] |
| SRFI-88: | Keyword Objects | [1 implementation] |
| SRFI-89: | Optional and named parameters | [1 implementation] |
| SRFI-90: | Extensible hash table constructor | [0 implementations] |
| SRFI-94: | Type-Restricted Numerical Functions | [0 implementations] |
| SRFI-95: | Sorting and Merging | [1 implementation] |