Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 775 552
2) Placement test : grammar for beginners (anonyme) 5 987 210
3) A/AN (webmaster) 5 362 256
4) Auxiliary BE (webmaster) 3 222 800
5) Present continuous (webmaster) 2 997 453
6) Present simple (webmaster) 2 908 565
7) Present simple (webmaster) 2 595 733
8) Present continuous (webmaster) 2 430 813
9) Adjectives (webmaster) 2 092 677
10) A/an (anonyme) 2 013 665
11) Present perfect simple (webmaster) 1 640 071
12) Preterite (webmaster) 1 623 430
13) Vocabulary - Placement test (bridg) 1 618 485
14) Preterite (webmaster) 1 444 676
15) Short placement test (webmaster) 1 442 841
16) To be (bridg) 1 405 294
17) What time is it? (webmaster) 1 348 303
18) Present perfect (webmaster) 1 343 562
19) The alphabet in English (webmaster) 1 320 210
20) Adjectives (anonyme) 1 215 051
21) What time is it? (webmaster) 1 206 607
22) Numbers (webmaster) 1 188 095
23) 'A' ou 'An' (anonyme) 1 174 245
24) Two presents: present continuous, present simple (webmaster) 1 148 265
25) To be (bridg) 1 144 803
26) Comparatives / Superlatives (webmaster) 1 101 015
27) Numbers (webmaster) 1 069 883
28) CAN / MUST (webmaster) 1 057 944
29) THE/ A / AN / nothing (webmaster) 1 032 160
30) Comparatives (webmaster) 1 006 613
31) Family life (bridg) 1 000 036
32) Numbers > 100 (webmaster) 985 897
33) Future (going to/will/present continuous) (anonyme) 962 476
34) Plural (webmaster) 955 117
35) Superlatives (webmaster) 874 366
36) Adjectives (anonyme) 874 130
37) Simple present (bridg) 853 117
38) Spelled words N°1 (bridg) 849 550
39) Placement test beginners: Check your spelling (anonyme) 829 774
40) Introducing oneself (webmaster) 826 794
41) Adverbs of frequency (anonyme) 816 224
42) Family (bridg) 784 099
43) General test-End of high school / Beginning of university (webmaster) 782 192
44) Present simple (anonyme) 778 988
45) Frequency adverbs (webmaster) 777 296
46) Present BE + Ving (bridg) 764 374
47) Genitive (webmaster) 723 097
48) Family tree (anonyme) 718 932
49) Passive form (anonyme) 717 333
50) Preterite: simple or continuous? (webmaster) 715 699
51) Placement test (beginners) (lili73) 700 405
52) Past simple or present perfect (anonyme) 692 617
53) Future (webmaster) 675 487
54) 2 Preterites (webmaster) 661 210
55) Present perfect simple (bridg) 659 075
56) Preterite (webmaster) 619 455
57) List of 200 irregular verbs and audio (bridg) 615 451
58) Modals (webmaster) 612 339
59) Spelled words N°2 (bridg) 608 727
60) Height (webmaster) 606 024
61) Modals (webmaster) 604 225
62) Articles a / an / the (anonyme) 596 740
63) Plural forms (bridg) 576 865
64) Nationalities (webmaster) 573 839
65) Past continuous / Past simple (anonyme) 564 601
66) Irregular plurals (bridg) 553 102
67) Two presents: simple and continuous (webmaster) 549 127
68) Preterite (bridg) 548 409
69) Superlatives (frapedur) 536 700
70) Vocabulary: greeting people (here4u) 536 436
71) Give your opinion (bridg) 531 497
72) Adverbs of Frequency (bridg) 516 593
73) Present simple or continuous (anonyme) 509 451
74) Present perfect / preterite ? (anonyme) 507 826
75) Possessive case (anonyme) 480 195
76) Countries & nationalities (bridg) 472 952
77) 'The' or nothing? (webmaster) 470 952
78) Introducing oneself (easy) (webmaster) 470 439
79) Past tenses (bridg) 470 181
80) Passive voice (webmaster) 462 295
81) Present Simple vs. Past Simple (anonyme) 455 858
82) Questions : how to ask them (anonyme) 447 849
83) General Test II / End of high school / Beginning of universi (webmaster) 445 837
84) IN, ON, AT or TO? (webmaster) 444 614
85) Relative pronouns (webmaster) 443 748
86) Comparative of superiority (anonyme) 437 566
87) How to pronounce the final -ED? (past simple) (webmaster) 436 742
88) Relative clauses (webmaster) 422 892
89) Sounds: [h] (webmaster) 419 265
90) Comparative (anonyme) 412 764
91) A/an/Ø (bridg) 398 219
92) Future simple (anonyme) 395 680
93) Past simple (anonyme) 395 227
94) This / That / These / Those (webmaster) 392 220
95) Conditional (webmaster) 391 218
96) Passive voice (anonyme) 389 935
97) Comparing (webmaster) 387 750
98) Can / could/ may/ might (woodyrun) 378 991
99) Present perfect or past tense (anonyme) 376 491
100) Much, many, little and few (felin) 371 903
101) Personal pronouns (anonyme) 371 169
102) Preterite continuous (BE + -ING) (webmaster) 368 299
103) Some, any, no, enough, too/too much/too many (webmaster) 367 886
104) Genitive case (bridg) 367 489
105) Confusing words - Placement test (bridg) 364 404
106) Irregular verbs (webmaster) 363 162
107) Numbers from 1 to 10 (anonyme) 361 266
108) Past perfect simple, past perfect continuous (anonyme) 360 705
109) Present continuous or present simple (webmaster) 359 333
110) Present perfect or preterite? (anonyme) 355 953
111) Simple Past : regular verbs (anonyme) 352 219
112) Comparative Adjectives (bridg) 351 945
113) Who, Whom, Which, or Whose? (anonyme) 348 388
114) Past simple (video) (anonyme) 347 704
115) Past simple or past continuous (anonyme) 341 047
116) While / When (anonyme) 337 893
117) What time is it? (webmaster) 337 446
118) Modals (tinou) 336 262
119) Modal: may/might (anonyme) 333 913
120) Cardinal and ordinal numbers (anonyme) 328 465
121) The superlative (anonyme) 324 104
122) Possessive adjectives and pronouns (woodyrun) 323 833
123) How to talk about the weather (lili73) 320 853
124) Since and for (anonyme) 318 304
125) Flags (webmaster) 317 281
126) Irregular verbs (bridg) 315 664
127) Prepositions - in, on, at (anonyme) 313 904
128) Pronouns (woodyrun) 312 869
129) Tenses (anonyme) 311 518
130) Placement test 3 (webmaster) 310 190
131) Order of adjectives (webmaster) 306 337
132) Could/Couldn't (laure95) 305 602
133) Comparative (anonyme) 304 126
134) Adjectives and prepositions (anonyme) 303 882
135) Agreement Tags (webmaster) 303 818
136) Asking questions (webmaster) 302 853
137) Present perfect OR simple past? (bridg) 298 115
138) Questions in the past tense (anonyme) 297 151
139) Superlative Adjectives (bridg) 295 498
140) Uncountable nouns (webmaster) 295 350
141) Object pronouns (bridg) 294 335
142) Placement test 1 (anonyme) 292 477
143) Present simple (anonyme) 290 533
144) Passive form (anonyme) 289 610
145) Prefer/rather (bridg) 289 040
146) Can/Must/Should (laure95) 288 666
147) Past perfect (lili73) 286 838
148) Must or Have to? (woodyrun) 286 760
149) The/an/nothing (bridg) 284 880
150) To be (anonyme) 283 318
151) Vocabulary: asking and answering (here4u) 280 422
152) Can and can't (laure95) 280 141
153) Modal verbs (bridg) 277 069
154) Some / Any / no... (bridg) 270 120
155) Days of the week (bridg) 269 030
156) So / neither (anonyme) 264 206
157) Past simple (video) (anonyme) 263 485
158) Used to (bridg) 260 210
159) Should / must (anonyme) 259 184
160) Past tense (anonyme) 259 077
161) Present continuous (chnawa) 259 040
162) Vocabulary: on the phone (here4u) 258 698
163) Find out a quantity (webmaster) 258 435
164) Superlative + and adjective (anonyme) 256 948
165) Articles : a / an / the / Ø (anonyme) 255 743
166) Comparative and superlative (anonyme) 254 347
167) Numbers 1/100 (anonyme) 253 306
168) Modal can (video) (anonyme) 252 673
169) Relatives pronouns (who, which, that...) (anonyme) 247 796
170) Comparatives (anonyme) 245 906
171) Vocabulary: at the restaurant (here4u) 245 632
172) A few, a little, few, little (anonyme) 244 912
173) Would rather / would prefer to (anonyme) 244 111
174) Present continuous and the Going to form (anonyme) 242 316
175) Have something done (anonyme) 239 631
176) Should/ have to/ must (anonyme) 239 531
177) The past (webmaster) 237 696
178) Future continuous and future perfect. (felin) 237 397
179) Used to/would (woodyrun) 237 180
180) How to ask a question in English (bridg) 235 001
181) I wish, if only (felin) 233 914
182) Pluperfect (webmaster) 233 668
183) Countable or Uncountable? (webmaster) 232 933
184) Some / any (younes91) 232 041
185) Should / shouldn't (anonyme) 231 131
186) Present simple or continuous (bridg) 230 766
187) Adjectives - ing and ed (felin) 228 645
188) Hypothesis (webmaster) 227 859
189) Auxiliary BE (anonyme) 226 235
190) Articles a/an/the/0 (bridg) 226 063
191) Article The or nothing (anonyme) 225 749
192) Present perfect with Ever - never - (anonyme) 225 336
193) Present continuous OR Present simple? (bridg) 225 208
194) Must or mustn't (laure95) 224 757
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 651
196) To / in order to / so as to / so that (irish21) 219 647
197) Present perfect (bridg) 219 322
198) What time is it ? (anonyme) 217 448
199) Comparison (komiks) 217 273
200) Indirect speech (bridg) 216 005
