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Curated Collections

Concurrency & Parallelism Libraries

C++ and language-agnostic toolkits supporting multi-threading, distributed execution, lock-free data structures, actor-based concurrency, or GPU offloading.

The Linux Foundation

by The Linux Foundation

51 projects ・ Updated 14 Mar 2025

Project
Contributors
Organizations
Software value
Akka
3,300
740
$22M
Swoole
2,533
399
$7.3M
ZIO
2,112
385
$7.1M
Apache Pekko
1,303
206
$21M
Kokkos Project
1,244
197
$658M
Akka.NET
1,220
264
$14M
Eventlet
974
298
$1M
Skynet
916
68
$2.3M
Seastar
843
173
$4M
Rayon
832
314
$972K
Cats Effect
800
254
$1.5M
userver
778
40
$18M
Trio
666
233
$1.5M
Crossbeam
622
243
$1.1M
Taskflow
562
125
$28M
ACE/TAO
528
42
$58M
Billiard
515
188
$436K
Sogou C++ Workflow
497
54
$1.8M
Greenlet
471
168
$388K
Celluloid
458
202
$265K
parking_lot
454
181
$345K
LMAX Disruptor
451
100
$633K
Lwt
446
142
$1M
moodycamel::ConcurrentQueue
433
102
$9.3M
CAF
395
97
$5M
ember-concurrency
389
127
$290K
threads.js
373
111
$139K
DashMap
361
163
$96K
Parallel
360
144
$64K
Microsoft Visual Studio Threading
337
54
$1.9M
ants
336
82
$130K
Boost.Context
331
106
$753K
workerpool
288
93
$213K
Piscina
255
99
$385K
numactl
240
78
$250K
Once Cell
233
111
$85K
Dagger.jl
193
75
$1M
VerCors
186
12
$8.6M
Kompute
173
35
$595K
multiprocess
147
55
$5.3M
Worker Farm
127
55
$31K
Scala Parallel Collections
120
33
$323K
async-channel
103
49
$50K
Tinypool
75
36
$115K
Effection
74
31
$618K
PyEE
74
34
$75K
threadpoolctl
63
32
$83K
event-listener
46
30
$68K
Chronicle Software
0
0
$0
Gloo
0
0
$0
HPX
0
0
$0
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